The jts-wrapper module was originally donated by SYS TECHNOLOGIES, it is an implementation of the GeoAPI ISO Geometry interfaces done up as wrappers around the Java Topology Suite SFSQL implementations.
Since the JTS project tracks the SFSQL specification there is not a direct one to one mapping; while this code has been used in a commercial setting there is no way this module is going on to support life in a three dimensional world.
There have been reports of synchronization problems between the wrapper classes (that implement the ISO Geometry interfaces) and their internal JTS Geometry object. But for the most part you can use this module without trouble.