In reply to TobyA:
Hard wearing? No. Easy to handle and knot? Yes
I got mine for an alpine rock trip, where the main part of the routes would be using 2 half ropes, with some easier moving together on ridges thrown in. I've never been that psyched using one strand of a half rope in this way, so having the Joker which is a bit thicker and can be used with an 8.5 on the technical stuff is ideal.
I've used it as a single as well at a push, but this did noticeably hammer it. Also, you can't use it with a grigri. For a while it was my grit rope - just tie in to the middle and off you go. If you don't need it for the reasons I got mine, I'd question why so thin? Going so thin will really limit the lifespan. But, for what I've used it for, I'd buy one again. And if you're travelling and want a do-it-all rope, it's perfect.