These cases are excellent - lightwight but durable and well constructed.

The only real issue isn't with the cases, but with the locks. The keys supplied with them are junk, made of a weak potmetal. The first thing you should do on installing them is go to a competent locksmith and have the locks lubricated and new, more durable keys cut. I had a set of brass keys made to replace my supplied keys, and they made all the difference.

Also worth considering the locking pieces for the racks.

Much lighter and easier to use than touratech's version, these boxes are great for most touring purposes. The rivets keep weight at a minimum and the easy open/close mechanism doesn't overly complicate a simple design. Users seem to have a habit of breaking keys until they get the hang of turning them correctly while opening, and the side bumpers offer great protection for the rare instances you forget to lock it to the bike after swapping it around the fleet. A solid performer for the money.

After saving and spending a full year of research, I decided on the SW Motech EVO Alu Box instead of the newer Adventure Sidecases for my Honda NC 700X.
I was most impressed with the solid aluminum mounting system that did not depend on some sort of composition plastic attachment like some of the other brands on the market.
Once the mounting bracket was installed, the cases slip right on in seconds. I also got the 6 matching locksets so I can add the top case later. They appear to be very durable and the 37 liter does not extend past my handlebar width with the installed SW MOTECH had guards.
It rained this week and since this is my only transportation I was able to evaluate the water tightness in a real serious hours long downpour. No leaks! I was also surprised that the inner liners are so well constructed.
I am a big fan of the SW MOTECH line and have installed the engine guards, skid plate, steel rack and hand guards. The engineering is top class and fitment is easy.
The right side box arrived with a small dent on the bottom edge with no damage to the shipping box in that area. I was puzzled and I had considered sending it back, but with the case mounted it was hardly noticeable. Since I will be using these for camping, dirt road riding and adventure touring I figured a pre-dent was a lucky dent.
I am very pleased and would highly recommend this if you are considering an adventure type luggage solution.