Have had it now for 5 months, but starting to put some miles on it outdoors this spring. Weight,handling and fit for me (53cm) was PERFECT (I'm 5"10 w ~32" inseam). Had it fitted and I'm not sure they adjusted anything - besides seat height, it fit out of the box for me almost perfectly.
On the downside, there was a couple small scratches on the frame that I didn't catch until I examined it outside in the sun. Not quite worth the hassle of shipping it back to Backcountry though.
Love it and highly recommend BMC and the SLR01.