In reply to Ethan Thomas:
There's 2 things a climbing back should do:
1. Be small and sleek, offer easy access to gear loops on harness.
2. Carry climbing gear to crag, point 1 being more important than carrying comfort.
The Crag Rocket looks brilliant, definitely ticks box 1, such the right colour too. Good luck, I hope they are well received. However, I like to protect my rope and helmet from knocks or the elements, crampons less likely to fall off and be lost carried inside too!
I have a Simond Cliff 20l bag, which also ticks 1, too small for point 2.
Regards
Stuart