TW is not bad, my only complaint is that it is slow on the Captivate, and it looks too much like the iPhone GUI! Now there are features in TW that I like for example the Call and Messaging a Contact by swiping left or right for either function is great! One thing I like is using Launcher Pro and still getting to use the TW feature on the Contacts! I have Tried Vanilla, TW, Sense, ADW and Launcher Pro and I always go back to Launcher Pro on the captivate and I would use it on an HTC device *sense is cool*. Just my $ 0.02!
Cheers,
Charlie