While it's true the Barfly is easy to twist, I've not found it gets knocked out of alignment. It tends to just sit there. If it does get nudged, such as when I'm cleaning the bike, I just nudge it back into alignment, no biggie.

I like the out-front mounting; from an aesthetics standpoint, I prefer it to stem mount, but also, I think stem mounted computers are too far back for natural viewing (in my riding position) and not 'at hand' for manipulation while riding. I guess it just feels more natural to reach across than it does to reach across and back.

I think the SRAM is the best looking out front mount, what with its elegant lines, but I went Barfly because it was available in white.