I use this for my acoustic guitar,
It's the most comfortable capo ever. Seriously.
I was a little bit afraid of this design at the beginning, then read some reviews and videos about it and decided to get on. And you know, it is really great, does it's job perfectly for all 6 strings, no issues, no buzz, no nothing, and because of it's design you can put it on and off guitar's neck very fast and comfortably!
And materials seems to be very durable. Would buy another if I lost this one, or friend guitarist wouldn't give it me back :)
P.S.
Don't leave your capo on guitar when not playing ;)