First I have to say that I use the picks for Bass. After a lot of testing, I finally decided for the Planet Waves 3DBK6-10 Bk Ice Picks Heavy with the 1,1mm gauge.
Grip: The picks don?t slip out of my fingers, even when my fingers are sweaty. A big plus!
Durability: Can?t say a lot about the durability, because I don?t play with the pick consistently. But by now, I never had to replace when because it got broken etc. I just have to replace from time to time because they got lost in my pockets ;) So far another plus!
Size/Quality: Besides the good durability and grip, I like the picks because of its size. It slightly bigger than the other picks I used, which really helps with the grip.