I am slowly migrating my 3D models to YouMagine and experimenting with PinShape at the same time. I may have more to say about them in a little while. But for now my migration to YouMagine isn't just a straight copy of my 148 designs on Thingiverse. It's a thoughtful culling of old designs and obsolete iterations, as well as updating some of the designs as I go.
For instance, a new version of my Charles 'O Perry chess set is now on YouMagine that is bigger, with better tolerances, and will print more successfully on more printers.
And on a side note, the biggest complaint about YouMagine is that sharing the first 3 letters with YouTube is going to make it difficult when I start visiting one of them more and then want to visit the other.