Whist my friend thinks all capos are exactly the same, this proves they're not.
I bought the older model of this a few years back as my first capo after reading fantastic reviews about it and loved it. Somebody pinched it off a table at an open mic night I played at and I thought i'd just buy a cheap capo. I've spent the next 5 months having to retune the guitar every time I put a capo on because it bent and detuned the strings.
The planet waves tri action capo showed up last week and I've not had to slightly change the tuning when applying the capo. Offers an adjustable but even tension across the fretboard and after some adjusting, managed to completely cut out string buzz when it was applied. I also feel that when my cheap capo deadened a lot of the strings when it was on, whereas this doesn't affect the tone of my guitar at all.
Fantastic capo, well worth the few extra pounds.