These are pretty big picks. If you aren't used to triangle picks they might be awkward to use at first.
I used the green .88mm version of these picks for a while, but recently moved to the harder, 1mm version. I've been absolutely loving them. Their size helps with grip. I cant recall one of these ever slipping out of my hand. The triangle shape means you effectively get three picks for the price of one. They don't wear down particularily fast. I've used picks that wear down slower, but also picks that wear out much, much faster. Again, the triangle shape makes them last a long time.