Lambda the Ultimate

Hello LtU,
I've starting a project called OSET for building structure editors. I need people to try it out and give me some feedback.
The homepage is:
http://sites.google.com/site/rathereasy/oset
the manual is:
http://sites.google.com/site/rathereasy/manual
you can download the source:
http://code.google.com/p/oset/

Just read the INSTALL to install. Any feedback will be very much welcome.

Note: doesn't work with ocaml version 3.11.0 but works with 3.11.1 and 3.10.2