Son bought one against my advice. I thought it was ugly and told him to save his money. He bought it anyway, got it mounted up and Gawd was I wrong. The Keymod locks up solid and is feather light. Now I have to admit I'm trying to figure out how I can get a couple more!
I initially thought this one was ugly-looked like industrial shelving, ho-hum. But after handling it on the rifle it's the perfect diameter, smooth, no need for rail panels unless it's gets uncomfortably hot, (we haven't gotten that far yet.) And the keymod slots are a great idea, funny nobody thought of using them before and I'm sure they'll be the standard in the future.
I just wanted to post, I don't keep up on the industry and what's new. I wasn't excited about key-mods at all when I first saw them on this forum, but after handling one I've completely changed my attitude and I'm all in.
If you're looking for a rail or handguard/rail, this is a great one.