My concerns about Chen offers are usability and support. Is this piece of software decently easy to use (I certainly do wish go deep on technicalities) ? Is is commercial enough ?

It needs to be installed properly including the C++ stuff. I installed the official 2008 C++ Express version and then ran the supplied scripts to copy the needed files to the VFP Compiler folders, but I needed to copy some files from the new locations in Win7- not a big deal as the supplied scripts are just bat files. Once everything is there, you run the compiler whose Windows GUI lets you identify your project, select compiler options and set it going.

Re support and commercial viability: Chen has been extremely quick to respond. At the moment we're compiling complex projects including large vfpx libraries without a hitch. I'm highly impressed and have no hesitation using the product commercially.

I already use molebox ultra - that offers the significant advantage of xcopy installation - and there are already issues and hiccups there.

FWIW VFP Compiler also offers a "green installation" option in which runtimes compressed into a wrapper distribution exe will be unpacked if needed when the app is run, but it's less suitable for Vista or Win7 because of UAC. We've used inno with saved scripts that makes it very easy to assemble an installation.

Finally I'd recommend that you invest in a signing certificate, because increasingly protected apps sound alarms in virus scanners, especially newer versions of Norton Sonar that often automatically deletes a protected/compressed app. We've seen this for refox, defox, molebox and VFP Compiler. Signing the app seems to reduce the frequency.