“The basket itself is solid construction, and fits on to my Topeak rail. Its a good size to fit a box or a full supermarket green bag. There are places to hook a cargo net to keep the goods secure. The only reason I'm giving this 3 stars is because of the Quick Release mechanism.
While it locks on, it still slides up and down the rail while riding unless you secure it in place with a thick rubber band or an octopus strap.
I dont think it will fall off, but it hits you in the backside while riding if it moves around.”