I recently got a project where a SubD solution was needed so downloaded the demo of T Splines to see how effective it would be for me as opposed to Modo.
I find it to be far more useful within the interface than exporting out to modo. Far! Modo has a few tools which I wish TSplines had…selecting a loop via faces, instead of having to use edges, and then cutting that loop up. I can do the same in T Splines but in some cases takes a few more steps.
Modo’s smoothing is tighter than TS so the model in TS looks different than it does in Modo. Also not a big deal.
I love being able to use nurbs to add details to a subs model and Rhino/TS is very capable in this area. I think this alone sold TS for me. Great app and if it didn’t get any better it would still be a wonderful addition to Rhino.