Good strong roof box, very easy to fit to pretty much any roof bars. It locks in place using four U shaped bolts which hook over the bars and are then tightened using large nuts with plastic thumb grips on them. I had it up there in about 15 minutes single handed.
It has a pneumatic strut that holds the lid open, and the overall construction is solid and heavyweight. When loaded I found it quiet, but running when empty, I found it wanted to lift up a little at speed. Locking feels secure, although a bit fiddly. The keys are small and you have to get all the catches lined up just so to turn them in the lock.
Good, solid, easy to fit, no major problems.