Well, after sitting thru a session last September at the Austin GDC with Bill Dalton who is the tech director at Bioware, he was very clear in stating that using licensed software such as this may not save any time whatsoever, because especially in their case they are modifying it so heavily. He said they have a full source code license and in some cases have fixed part of Siumltronics code and handed it back over to them.

As long as something like this isn't cost prohibitive for a small studio, then I can see it being helpful there. Not sure what the licesing fees are for something like this.