I've been using Mission belts for 4-5 years. They keep breaking so I figured I'd get a tandem for what 1 tends to cost on other brands. These do the job just fine. The solid buckle a has a NICE lock to it and doesn't slip. The hollow buckle, where it's a squarish frame, tends to slip a little easier as the release is not as secure by design. I thought I'd like the look of the hollow one, and I do, but I dislike the amount of attention I have to keep on it with regards to belt slip.