I’ve had my 3501BO for about 6 years purchased directly from the Luminox website. It arrived with a loose bezel that rotates much easier than it should so I’m constantly having to readjust it. The strap lasted a while but eventually the strap keepers came apart and I had to purchase a new band. My model has a mineral crystal and it scratches fairly easy, I’d suggest getting a model with a sapphire crystal if you can. The tritium illumination is pretty good and very easy to see at night. All in all it’s not a bad watch, but I wouldn’t say it’s worth the asking price