Matt, Chris and I went up the left hand (Puzzling Evidence) rope last year. It was an enjoyable climb, a bit technical nearer the top, where it becomes more of a traverse than a climb. I'm pretty sure that it uses spits for most of the higher bolts.
The only frustration I've found with it compared to the printed rigging guide is that it doesn't give breakdowns lengths between rebelays. Fine if you've got loads of rope, but if your planning on switching ropes at rebelays it makes packing a fair bit harder!