In reply to gavjwp:
I had a bit of a love hate relationship with mine. Nice bag as long as you packed carefully. I never found a satisfactory way to carry rope or helmet on the outside.
For me this meant it was fine for mid summer or for sport climbing, but if I was going trad climbing and was packing a few layers I ended up over-stuffing it. Obviously it has a huge zip all the way down it so over-packing it meant the zip failed when there was otherwise plenty of life in it.
I’m not very good at packing light though, so might be fine if you are.