Been a while since I tried it, and I really want it, just waiting for some spare cash. I'm using the nVIDIA software for now ....... free, but not nearly as versitle as UM.

But I digress......
I had no issues with WB, and UM. I don't remember exactly about any titlebar buttons it adds, but like nVIEW, which adds titlebar buttons, you can turn them off. (they show up where they want, and are unskinnable with nVIEW)
UM has a 30 day, non crippled demo.......... try it out, it's a great app.