I've used Stop Motion Pro for ages- version 5 or 6 I think, was the last one. I liked it. But my old PC died, and I now have a Mac in my studio, so I won't upgrade to Eclipse until they have a native Mac OSX version. So I haven't had a computer that can run Eclipse, to test it on.
In the meantime I am using Dragonframe 3 on my iMac. Both SMP and DF are good, they arrange things differently but end up able to do most of the same things. Both work really well with the Canon DSLR/Nikon lens combo that I use, and do everything I want them to.