Update README.md (#23)

* Update README.md 

Updating the Readme to contain more direct messaging about our Early Access.

* Update README.md

Added suggestions

Author: nhaq-confluent

README.md

@@ -1,34 +1,26 @@
 Confluent's Javascript Client for Apache Kafka<sup>TM</sup>
 =====================================================
 
-**confluent-kafka-js** is Confluent's Javascript client for [Apache Kafka](http://kafka.apache.org/) and the
-[Confluent Platform](https://www.confluent.io/product/compare/).
+**confluent-kafka-js** is Confluent's JavaScript client for [Apache Kafka](http://kafka.apache.org/) and the
+[Confluent Platform](https://www.confluent.io/product/compare/). This is an **early access** library. The goal is to provide an highly performant, reliable and easy to use JavaScript client that is based on [node-rdkafka](https://github.com/Blizzard/node-rdkafka) yet also API compatible with [KafkaJS](https://github.com/tulios/kafkajs) to provide flexibility to users and streamline migrations from other clients. 
 
+This library leverages the work and concepts from two popular Apache Kafka JavaScript clients: [node-rdkafka](https://github.com/Blizzard/node-rdkafka) and [KafkaJS](https://github.com/tulios/kafkajs). The core is heavily based on the node-rdkafka library, which uses our own [librdkafka](https://github.com/confluentinc/librdkafka/tree/v2.3.0) library for core client functionality. However, we leverage a promisified API and a more idiomatic interface, similar to the one in KafkaJS, making it easy for developers to migrate and adopt this client depending on the patterns and interface they prefer.
+__This library currently uses `librdkafka` based off of the master branch.__
 
-Features:
-
-- **High performance** - confluent-kafka-js is a lightweight wrapper around
-[librdkafka](https://github.com/confluentinc/librdkafka), a finely tuned C
-client.
-
-- **Reliability** - There are a lot of details to get right when writing an Apache Kafka
-client. We get them right in one place (librdkafka) and leverage this work
-across all of our clients (also [confluent-kafka-python](https://github.com/confluentinc/confluent-kafka-python),
-[confluent-kafka-go](https://github.com/confluentinc/confluent-kafka-go) and
-and [confluent-kafka-dotnet](https://github.com/confluentinc/confluent-kafka-dotnet)).
+## This library is currently in early access and not meant for production use 
 
-- **Future proof** - Confluent, founded by the
-creators of Kafka, is building a [streaming platform](https://www.confluent.io/product/compare/)
-with Apache Kafka at its core. It's high priority for us that client features keep
-pace with core Apache Kafka and components of the [Confluent Platform](https://www.confluent.io/product/compare/).
+**This library is in active development, pre-1.0.0, and it is likely to have many breaking changes.**
 
-## This library is currently not ready for production use. It's an early-access preview in active development, pre-1.0.0, and there might be breaking changes.
+For this early-access release, we aim to get feedback from JavaScript developers within the Apache Kafka community to help meet your needs. Some areas of feedback we are looking for include:
+- Usability of the API compared to other clients
+- Migration experience from the node-rdkafka and KafkaJs
+- Overall quality and reliability
 
-This library is based heavily on [node-rdkafka](https://github.com/Blizzard/node-rdkafka).
+We invite you to raise issues to highlight any feedback you may have. 
 
-This library contains a promisified API, very similar to the one in [kafkajs](https://github.com/tulios/kafkajs). Some of the tests are also based on the ones in kafkajs.
+Within the early-access, only **basic produce and consume functionality** as well as the ability to **create and delete topics** are supported. All other admin client functionality is coming in future releases. See [INTRODUCTION.md](INTRODUCTION.md) for more details on what is supported. 
 
-__This library currently uses `librdkafka` based off of the master branch.__
+To use **Schema Registry**, use the existing [kafkajs/confluent-schema-registry](https://github.com/kafkajs/confluent-schema-registry) library that is compatible with this library. For a simple schema registry example, see [sr.js](https://github.com/confluentinc/confluent-kafka-js/blob/dev_early_access_development_branch/examples/kafkajs/sr.js). 
 
 
 ## Requirements
@@ -39,8 +31,7 @@ The following configurations are supported for this early access preview:
 * Linux (x64 and arm64) - both glibc and musl/alpine.
 * macOS - arm64/m1.
 
-Installation on any of these platforms is meant to be seamless, without any C/C++ compilation required. It can be installed
-from GitHub:
+Installation on any of these platforms is meant to be seamless, without any C/C++ compilation required. It can be installed from GitHub:
 
 ```bash
 $ npm install "git+ssh://[email protected]/confluentinc/confluent-kafka-js.git#v0.1.6-devel"
@@ -50,6 +41,51 @@ Yarn and pnpm support is experimental.
 
 # Getting Started
 
+Below is a simple produce example for users migrating from KafkaJS. 
+
+```javascript 
+// require('kafkajs') is replaced with require('confluent-kafka-js').KafkaJS.
+const { Kafka } = require("confluent-kafka-js").KafkaJS;
+
+async function producerStart() {
+    const kafka = new Kafka({
+        kafkaJS: {
+            brokers: ['<fill>'],
+            ssl: true,
+            sasl: {
+                mechanism: 'plain',
+                username: '<fill>',
+                password: '<fill>',
+            },
+        }
+    });
+
+    const producer = kafka.producer();
+
+    await producer.connect();
+
+    console.log("Connected successfully");
+
+    const res = []
+    for (let i = 0; i < 50; i++) {
+        res.push(producer.send({
+            topic: 'test-topic',
+            messages: [
+                { value: 'v222', partition: 0 },
+                { value: 'v11', partition: 0, key: 'x' },
+            ]
+        }));
+    }
+    await Promise.all(res);
+
+    await producer.disconnect();
+
+    console.log("Disconnected successfully");
+}
+
+producerStart();
+```
+
 1. If you're migrating from `kafkajs`, you can use the [migration guide](MIGRATION.md#kafkajs).
 2. If you're migrating from `node-rdkafka`, you can use the [migration guide](MIGRATION.md#node-rdkafka).
 3. If you're starting afresh, you can use the [quickstart guide](QUICKSTART.md).