I have used a lot of ATC's and this one is my favorite design! It works flawlessly for running double 8 mm ropes all the way up to the 10.5's I have used. They are super simple to use and have no moving parts. I would take one of these over a Grigri or a cinch any day. There is just a lot less potential for something to go wrong. I have personally noticed quite a few people belaying with those types of devices and they all seem more inclined to pay less attention to the climbing because they feel safe however they cannot be guaranteed to work 100 percent of the time so if you choose to get something more mechanical please pay attention. I have never had any problems with my XP! The lock off is great and the other the smooth side is perfect for faster rappels. If you are looking into rapping down a wall a little faster I would recommend looking into a figure 8 (they are harder to use but you can really fly on them).

The best belaying device I have owned so far. The rope glides incredibly well and yet provides variable friction when catching a fall in a very safe manner. I never experienced any yanking when feeding the rope to a lead partner.
HIGHLY RECOMMENDED!

If you are buying an ATC-XP (and if you're thinking about it ... you should) you're going to need a biner to go with it. Spend an extra seven bucks and get a great deal on a superb belay biner. The four bucks you save might not seem like much but that's about a 15% discount for something you're going to need anyhow. Fork it over!

I got this package for price and quality.
ATC-XP is an award-winning belay device, and it does live up to its reputation. Rocklock Screwgate is just a carabiner - nothing special about it. A larger carabiner with a wider openning would have been better, but as standard belay equipment Rocklock Screwgate is just fine.