Bought mine off ebay for a trip to Morocco in April, guy couldn't be more helpful. Made my own rack for £2 with some 1"pipe and 1"flat steel, bit heavy but very strong. I have been using the bike over the past month in all weathers with the panniers fitted so far no leaks despite some heavy rain.

Likes-
easy to put on and take off,
locks are easy to use,
look good,
like the lid as I strap two dry bags with our sleeping bags on top.
Dislikes- would have preferred a hinge on the lid but can easily live without it, wonder how effective the locks will be but then again a lock only keeps an honest man out.

I have then fitted to my Dl650 weestrom and have not noticed any adverse handling issues and the dont stick out too much. Overall for £320 I am very happy with the product.