Yep I use a Samsung SC-X210L. Probably the easiest, no hassle hatcam on the market. With many more features to make it very versatile. I have been using it for quite sometime and haven't had any problems with it. And as far as holding up the squad.... I would have to agree with Jim that there are far more people wasting time messing with there other equipment than people and their hatcams. But that is just my observations. I just bolt mine onto my hat brim using a 7/16" bolt. Or you can mount it to a tripod and have a 3rd party video you also....Shown on a mini-pod for demonstration purposes, it does mount to a standard tripod as well.
Edited to add that my training videos on my YouTube page were videoed using this camera on a full sized tripod....