The shifting has been very impressive. Zero slips so far and easy to move up and down the big rear block. I do get a little rub when I'm in the little ring up front and shift down too far in the back but that's expected with a 30/46. I have found myself in the smallest gear a few times already. I haven't spun it out yet but have gotten the bike up around 25mph+ ... it does bounce a little at those speeds but nothing close to a real shimmy. I'd chalk up the bounce to the torque on the cracks and the rake of the fork.