I love these harnesses. I will say consider the 2" if you're a smaller person. My wife at 115/5'3 can't use the 3". It just can't be adjusted down far enough for her.
Also the youth harness works great. My 10 year old that complains non-stop about seatbelts loves it. Could be the race car driver feeling you get from it however. Either way, the DF harnesses are the most comfortable of any I tried.