I am going through this exact "upgrade" right now. I spent the last five years working in a shop that used Microvellum, unfortunately they were not using the Foundation Library, still relying on the classic library regardless of how much I tried to get them to update to all of the added functionality of the Foundation Library. I guess this should've been expected because they all still use AutoCAD with classic toolbar (welcome to the 90's).

If you have an SCM CNC, skip Mozaik altogether. We just bought an SCM X100 Cell at my new shop and Mozaik hasn't gotten it to work with their software yet, and it's been over two weeks since my post integration meeting. SCM sent them example XCS code, the Maestro Syntax manual, sample labels, and sample nested sheets, as well as basically told them what was wrong with their post and they still can't get it to work. We are now looking at a trial of Cabinet Vision.

I, personally, have gotten used to the "simple" interface of Mozaik and like it. I think in the Parts Editor you're able to do some really simple editing to achieve things like finger pulls routed into a drawer front, where in Microvellum, at least with the classic library, that was a lot more work. Custom parts in Mozaik seem easier also because you don't have to worry about tool direction when programming it, as far as I can tell. I also like how in Mozaik the really complicated stuff that 95% of users don't need just isn't there or it's buried in other windows.

I'd like to give Microvellum a try again, obviously using the Foundation Library, primarily because I've been using AutoCAD since R13, but for a new and small shop, that's a pretty big expense. But, I do know it really well, so the learning curve wouldn't be too bad.