I played with the CMM from I-deas 5 or 6 to NX6 and had pretty good results. I was not using Teamcenter, I used package files. Not the way to go for a production environment. Of the parts that did not covert correctly 100% usually it was just some simple fixes to get it to 100%. I just think it was amazingly cool to have that accurate of a translation and still have all the model/assembly/drawing relationships still intact. A lot of the time it would not be to much of an issue if you had to make do with dumb models, but if you have a lot of parts then keeping the relations between assemblies and drawings helps out tremendously.