Really easy to assemble and perfectly stable on the bike, the best bags I ever tried.
EAsy to install. Good YouTube videos. Lite! I just keep it on the bike.
Installed X3/UD22 on my commuter bike (Budnitz Model E). Easy install and perfect fit with included hardware. The whole system looks sleek and like it was custom made for the bike. The bag is large enough to carry my laptop and work clothes. Feels solid and secure on the bike but it's super easy to remove when I get to the office.
Thank you for your review and comments, great that this has improved your commute to work! All the best from Bristol, Dan.