Love mine – prefer it to the BFe that it replaced.It just feels more lively and nimble.
Mine is fundamentally too small (just under 6 foot and it’s a 16.5inch frmae) but iy’s OK on shorter rides and mucking about. Running it with 150mm Z1’s on the fromt – felt better than shorter forks to me.
I don’t think there is much waiting to do re 650b. It’s here to stay and is pretty much the defacto choice now for most bikes. if you are swapping bits over from an exisitng bike, I’d bite the bullet and get one. Forks, tyres and rims will be around for a while yet.