XStream or Simple

Question

I need to decide on which one to use. My case is pretty simple. I need to convert a simple POJO/Bean to XML, and then back. Nothing special.

One thing I am looking for

Answer 1

So far I have never use Simple framework yet.

Based on my experience with Xstream. It worked well on XML. However, for JSON, the result is not as precise as expected when I attempt to serialize a bean that contain a List of Hashtable.