Well designed, well built, and well thought out travel bag. The compartments are really nice. The bottom will easily fit a helmet, bike shoes etc and enough gear to travel light for a bike trip. Be careful how the top compartment expands as you cram stuff in as it will bulge enough to not fit in the overhead bin. The dimensions are exactly overhead size but the top half of the bag is not rigid, so if you cram it, it grows.
The structure is solid, the pull handle feels solid and durable and the wheels are indeed silent and roll very very nicely. The branding is subtle and stylish and it's easily recognizable on the baggage claim if you do check it.
I do wonder how long it will last - the internal zips and mesh compartment separators feel cheap and like they may burst with a hint of over packing. Likewise the outer textured canvas (?) fabric, while it looks great, scuffs really easily. This bag wouldn't survive a lot of checked travel - definitely designed as a carry on.
All-in-all, great bag, worth the price - but we'll see how well it stands up to heavy travel...