I have used it for a few years and he keeps adding plugin (Various games formats, so you can work in your copy of Ultimate Unwrap on your game files, save them and play)
You can also use Ultimate Unwrap for many model functions. I have become familiar with it, and I can tell you it has many of the same top quality modeler functions available, so you can not only do UV work but model changes.upgrades, and format existing models you have to other formats. I love it.
I became a fan through Lithunwrap. Compared to Ultimate Unwrap it is limited, but it does have some uses, and it is free..