JVM that runs on Windows CE

We have a Domino application that runs on an R6.5 server, which will be accessed from a PDA running Windoes CE.Net. The Java Applets will not load and I suspect it is a result of the JVM.

There are 3rd party JVMs available which have been developed specifically for CE, namely NSICOM and Esmertec (available from BSquare).

Does anyone have any experience with these or any others? Thx in advance.