ANY ANSWERS WOULD BE HELPFUL
From what I have heard, the Samsung UI isn't very good, it is kinda laggy, and it feels cheap after a couple months.
Never had a problem with UI; the touch keyboard is actually more accurate than the Hero's, which is weird, since it also has a full QWERTY attached. Never had a problem with lag. Have no clue what you mean by 'feels cheap'.
In short, I love my Moment, and have yet to have any issues with it.