I’ve tried them and they definitey have their place. I tend to like fiddling around a bit too much on surface and with the dry gloves, it’s not like just taking off a glove to do something. I guess it’s a buddy sport, but if you both have dry gloves on, then there isn’t any way to do anything that requires dexterity. For just regular diving, I’ve not had a problem with 5 and 7mm gloves doing plenty to keep me warm for the duration of the dive.