In reply to Darren09:
I've got one of these. The issue I have with it is that the fabric isn't breathable and the only ventilation you get with it is the vent in the back. No underarm zips. I've had it out in the hills a lot but not in heavy rain so can't comment on it's waterproofness. Otherwise I like it, it's a nice fit, it's wind proof and very light. The full length zip does mean that you can wear it all day and adjust ventilation by having it open at the front or closed to some extent, but only if it's not raining.