Can't speak for the Unions, as I haven't tried them. But I demoed the TT30s this weekend, and am considering them in my own binding hunt along with the Forces too (my K2 Sonics need replacing). They were my 5th option for bindings, but I'm glad I tried em out. I'm an intermediate rider and can't relate specifics as a proper reviewer would, but I thought they were responsive, comfortable, and sucked up the chop for a smooth ride. These are like day and night compared to my sonics. I was going faster than I had before as the speed chatter wasn't there. I had no problems with ratchets on or off. Did take half the morning to get em adjusted properly to my boots, and super easy to adjust.
I'm going to demo the Force's in couple weeks as well.