Actually, I kind of resent the "flexi is unstable" comment. I agree that it IS overpriced.. Especially with some others that, IMO seem to do a pretty good job. As for Flexi being unstable? I have been using it now for 2 years and wouldn't switch. I REALLY like the features that are in Flexi. I like how technical/basic it is. I mean: If you want to get IN DEPTH with the software, there are features in there that I don't know to use yet.. As for basic, if you want to jump in and start using it.. It's pretty simple. There aren't any features that I can think of off the top of my head that don't work how they are supposed to.
I will agree, the latest update evidently has some bugs.. But, I haven't updated yet, so I can't say.
Oh, and I haven't used Composer, so I again cannot say.. I can just vouch for Flexi
Hope that's not stepping on anyones toes!!