economist

Assembling the first lock took less than an hour for this slow and careful non-locksmith. The second and third locks took maybe ten minutes each. The instructions are detailed and well-illustrated.

Yeah, it happens from time to time, but only after weak shifts from me.

The seat adjustment is in the manual, it is easy to do.

My 31l just barely fits my Shoei GT-Air (size L) or my Qwest (size XL). If you plan on using it to store your helmet when you are off the bike, you only have a few cubic inches of space left to store stuff. Otherwise, it looks great, locks up solidly, and functions flawlessly like factory luggage should.