bought aa five frame myself, 18″ about a month ago or so. Thought the angles were perfect coming from an 456ss but felt there was alot of pedal bob on the climbs.
sent the shock to Loco and got it back the other day, the difference is night and day, its gone from being a great bike, to a bloody awesome bike.
It not climbs great and as you say once you point it down the hill it takes off!
Definitely reccomend one!