reliability ??? I'm guessing your talking about the data. You did not state which versions you are comparing - but the latest I think are the about the same as far as reliability. In the Pro world you get all the source - but some of the code is old (meaning not using the latest foxpro features). AM does provide source but not all and many of the important data routines are not provided (mostly hidden in other classes). But like all VFP programs it is really impossible to hide code from a hacker. But they don't provide the all code. On the other hand AM uses the latest VFP tricks which makes programming a little easier. I also like AM over Pro because the AM code is much easier to read..

Better question - which provides a better fit to the client needs. Only the client and you can answer that...

John