I was fairly excited when this first came out, as it sounded like a better version of a Reverso, and one that would work well on both standard-size ropes and skinny half/twin ropes. However, I have a few gripes with it now that I've owned it and used it for a while. The first is its weight: just like the ATC XP from which it was derived, this thing seems way heavier than it needs to be. I guess the upside to this is, with its extra thick aluminum, it should last through years of heavy use, whereas some other aluminum belay devices apparently will start to wear and develop sharp edges after much heavy use. My other gripe is that, while the autoblock mode works wonderfully with skinny half/twin ropes, it's a huge pain to use with a pair of thicker ropes. There's way too much friction. I've only ever used it this way a few times, but on those few occasions I was wishing I had a good old Reverso. Since I bought this, the newer Reverso 3 and the Kong Ghost have come on the market (not to mention a few others), which are lighter and look a little less clunky than this device. But I've heard that at least the Reverso 3 isn't much better with a pair of standard-size ropes in autoblock mode, and that under heavy use its thinner metal still has the sharp-edges problem of the old Reverso. So perhaps there still is no single device out there that really does it all.