Installation and use has gone very smoothly for me. I did not have a problem closing the program after installation.
This upgrade came simultaneous with several microsoft and adobe updates and I did all of them progressively. Now all the updates and patches are set for all of the computers. I do one office at a time. I might not do the other for several weeks, since I am solo in this office I can deal with all the problems. The other office has my NP and I have to be prepared for any questions and problems.
This was probably the smoothest update I have done since sometime in version 3.
I do like the features in 5.15, I found a couple of minor bugs but they are not production stoppers.
Beta's are not for everyone. When you are working in a live environment you have to accept that you might damage your database. Never happened to me, I have ton's of backups and I will decode the new backups to make sure they work.
Bert is appropriately conservative and waiting until he knows things are stable. If I remember correctly, he didn't upgrade to V5 for about 5 or 6 months. This is not a bad course of action.
I prefer to be on the cutting edge and take the responsibility that I could have problems. To each his own. 4 hours of playing with it on my home machine convinced me it is a minor evolution, albeit with some nice additions, not a major transition and that I could not make it fail. Bert requires 4 months, so be it. Nothing wrong with that. THIS IS BETA.