I took the plunge for one of these… I guess, in part, having been pushed so hard on the OA podcast! See, advertising works! They were running a comp for free entry into the Outlaw Half and I figured there can’t be that many flying off the shelves so was in with a reasonable chance. Anyway… I digress!
I can’t comment on the aerodynamics. Suspect the advantage will be if it marries neatly with your stem? This will be inhibited by internal gear routing, forcing you to mount the flowcell further back. The dimples are pseudo-aero / cosmetic - I’m sure I’ve read studies that the surface needs to be rotating, like a golf ball.
The hatch is easy to slide open, one finger / thumb, so that’s a plus. My gut feel is that they are over egging the capacity unless comparing to a midget xlab 200 etc. I can jam in x6 regular high5 gels but the fit was better on my old soft sided bag (more compliant). There’s also no pouch for tablets (salt / caffeine etc) so these rattle around the bottom, waiting for you to finish the rest of your nutrition first. I wonder if it might be better suited to x2 packets of jelly babies, as suggested in the last OA pod…
Dimensions have been designed to accommodate the sliding lid / base unit vs sensible internal capacity. Fixed width might not suit all top tubes, where a soft bag might “form” around.
These comments all sound fairly critical… and so they should if paying £45 for a top tube bag! That said, it is a solid piece of kit and I’ll be racing with it at the weekend