Agree - Bumot is great kit and the best I've tried. The top lids open outwards which initially seems odd but is actually very useful as it gives you an extra platform, increasing the working surface area to put things on if you're rummaging in the box. No central locking though if that's important.
Using the SW Motech ones , they are nice and also the frames detach in seconds , prefer that to the fixed frames. Great quality as well and switching between laden and solo is perfect.
Explore BUMOT luggage systems for BMW R1300GS with BUMOT pannier racks. Choose Defender EVO aluminum cases or Xtremada EVO soft panniers for adventure travel.