diff --git a/README.md b/README.md
index 2a461f9..0487934 100644
--- a/README.md
+++ b/README.md
@@ -4,12 +4,12 @@ minimal-json
 [![Build Status](https://travis-ci.org/ralfstx/minimal-json.png?branch=master)](https://travis-ci.org/ralfstx/minimal-json)
 
 A fast and minimal JSON parser and writer for Java.
-It's not an object mapper, but a bare-bones library that aims at being minimal, fast, lightweight, and easy to use.
+It's not an object mapper, but a bare-bones library that aims at being
 
-* minimal: only one package, fair amount of classes, no dependencies
-* fast: performance comparable or better than other state-of-the-art JSON parsers (see below)
-* leightweight: object representation with minimal memory footprint (e.g. no HashMaps involved)
-* easy-to-use: reading, writing and modifying JSON shouldn't require lots of code (short names, fluent style)
+* **minimal**: only one package, fair amount of classes, no dependencies
+* **fast**: performance comparable or better than other state-of-the-art JSON parsers (see below)
+* **leightweight**: object representation with minimal memory footprint (e.g. no HashMaps involved)
+* **easy to use**: reading, writing and modifying JSON shouldn't require lots of code (short names, fluent style)
 
 Minimal-json is fully covered by unit tests, and field-tested by the [Eclipse RAP project](http://eclipse.org/rap).
 
@@ -51,11 +51,33 @@ for( JsonValue value : jsonArray ) {
 }
 ```
 
+### Access nested contents:
+
+```java
+// Example: { "friends": [ { "name": "John", "age": 23 }, ... ], ... }
+JsonArray friends = jsonObject.get( "friends" ).asArray();
+String name = friends.get( 0 ).asObject().get( "name" ).asString();
+int age = friends.get( 0 ).asObject().get( "age" ).asInt();
+```
+
 ### Create JSON objects and arrays:
 
 ```java
 JsonObject jsonObject = new JsonObject().add( "name", "John" ).add( "age", 23 );
+// -> { "name": "John", "age", 23 }
+
 JsonArray jsonArray = new JsonArray().add( "John" ).add( 23 );
+// -> [ "John", 23 ]
+```
+
+### Modify JSON objects and arrays:
+
+```java
+jsonObject.set( "age", 24 );
+jsonArray.set( 1, 24 ); // access element by index
+
+jsonObject.remove( "age" );
+jsonArray.remove( 1 );
 ```
 
 ### Write JSON to a Writer:
@@ -74,16 +96,16 @@ jsonObject.toString();
 jsonArray.toString();
 ```
 
-Build
------
+Concurrency
+-----------
 
-To build minimal-json on your machine, simply checkout the repository, `cd` into it and call maven:
-```
-cd minimal-json
-mvn clean install
-```
-A continuous integration build is running at [Travis-CI](https://travis-ci.org/ralfstx/minimal-json).
+The JSON structures in this library (`JsonObject` and `JsonArray`) are **not thread-safe**.
+When instances of these classes must be accessed from multiple threads,
+while at least one of these threads modifies the contents,
+the application must ensure that all access to the instance is properly synchronized.
 
+Iterators will throw a `ConcurrentModificationException` when the contents of
+a JSON structure have been modified after the creation of the iterator.
 
 Performance
 -----------
@@ -94,10 +116,11 @@ Below is the result of a performance comparison with other parsers, namely
 [Jackson](http://wiki.fasterxml.com/JacksonHome), and
 [JSON.simple](1.1.1).
 In this benchmark, an example JSON text (~30kB) is parsed into a Java object and then serialized to JSON again.
-All benchmarks can be found in `com.eclipsesource.json.performancetest`.
+All benchmarks can be found in [com.eclipsesource.json.performancetest](https://github.com/ralfstx/minimal-json/tree/master/com.eclipsesource.json.performancetest).
 
-Although it cannot outperform jackson's exceptional writing performance (which is, to my knowledge, mostly achieved by caching),
-minimal-json offers a very good reading and writing performance.
+Although minimal-json cannot outperform Jackson's exceptional writing performance
+(which is, to my knowledge, mostly achieved by caching),
+it offers a very good reading and writing performance.
 
 ![Read/Write performance compared to other parsers](https://raw.github.com/ralfstx/minimal-json/master/com.eclipsesource.json.performancetest/performance.png "Read/Write performance compared to other parsers")
 
@@ -105,6 +128,16 @@ Disclaimer: This benchmark is restricted to a single use case and to my limited
 It probably ignores better ways to use these libraries.
 The purpose of this benchmark is only to ensure a reasonable reading and writing performance compared to other state-of-the-art parsers.
 
+Build
+-----
+
+To build minimal-json on your machine, simply checkout the repository, `cd` into it and call maven:
+```
+cd minimal-json
+mvn clean install
+```
+A continuous integration build is running at [Travis-CI](https://travis-ci.org/ralfstx/minimal-json).
+
 License
 -------