It could do with a ridge to rest ones hand against as it does get a little tiring squeezing onto it all the time but I'm sure it's something I'll get used to. Aside from that, this is crazy cheap compared to other similar parts on offer here.
One thing worthy of note, though, I bought this to go with the Harley Benton Slider II and didn't actually realize that one came with the guitar, anyway, so now I have 2 ! Still, spares are always handy and at this price I don't begrudge it enough to return it so I'm keeping it until I lose the other one ;-)