Just for that feature, i am willing to drop windows, as it is sooooo usefull when working
This is one of (if not everything) that JiTouch does better than BTT (for me). I used to use BTT for a very long time and loved it. But then it glitches on me and I had to re-assign all my gestures again (as they had been lost) and this is when I discovered JiTouch and it's just a much simpler, much cleaner program and with it's character recognition I find that it even further streamlined my workflow more so than BTT did with all it's gesture enhancements.
But the windows snap feature is a simple gesture in JiTouch, if i swipe to the left with my index and ring finger, the window snaps to the left half of the screen and vice-versa. The only things is BTT allows you to actually snap into quarters, which JiTouch doesn't, but considering i'm on a MBP, I don't really need that as the area gets too small. If I was on a 27" iMac, quarters wouldn't be such a bad idea.
The only problem is that JiTouch isn't free. But I found it worth the money. Regardless BTT is great, I just prefer the ease and simplicity of JiTouch.