In reply to Bluebird: I have a Roc Lite Pull. I am actually sponsored by Haglöfs and tried one of the early samples of this smock. I really liked it and have been using mine all season here in the alps - in fact the weather has been bad so I have worn it a lot!
It's Gore Tex Pro so although light feels fairly substantial. I like the simplicity of the design and the single chest pocket. This has a neat bellows arrangement which keeps it out of the way when climbing, but will still swallow larger items. The hood is very good also and can accommodate a helmet easily with good adjustment.
I really should do a review! Finally FWIW it was great to see Haglöfs have this in the range. There are so many commercial pressures against smock/pullover designs. But they remain a really good choice in bad weather, or if you wear a harness regularly.