UVLayout ftw. Well worth the money for me. Not only one of the best unwrapping methods, but also several options for relaxing by uv chunk/island or brushes for doing localized tweaks and stuff. The UI is one of my favorite aspects of the tool. Heavily shortcut and mouse driven, which I like.
I use 3dsmax too, I've tried out a few tools but in the end I pretty much stick to max. HeadusUV (not free, wonky interface has some cool tools but really not worth it IMHO) http://www.headus.com/au/uvlayout/ Crazy Butchers LSCM Unwrap (Great script) http://www.luxinia.de/index.php/ArtTools/3dsmax
@claydough: yes but not really in depth or much. I have been told however by other students I know that it is supposed to be real good in comparison with max or maya. Crazy Butchers LSCM Unwrap is based on the Blender LSCM unwrapping code which is also why he put it free under the opensource license. There is another…
uvLayout, anything else compared by it is just poor in performance, features and workflow including all specific UV tools that are on the market. But if you are just after relaxing its not worth the hefty price,- maybe then instead go with Roadkill, existing max/maya relaxing tools or like mentioned above the Crazy…