The pattern and colors on the picks I personally find very appealing and pretty; however note that the 'Fender' logo wears off within about a day.
It's hard to comment on their durability as you can't set a general tone with an assortment of picks in different thicknesses. If you're using the thin picks for strumming on an acoustic or playing funk on electric etc and the heavy gauges for your jazz, metal and whatnot, yeah sure they're durable-ish, nothing that's too impressive or disappointing.
Finally, the grip I'd say is not too great. Especially compared to something like a Tortex or some other Dunlop picks.
Let's face it, these are the picks you buy because you like looking at them, not because they're great. If you want a 'good' pick, you'd much better opt for something else.