The snuzza was a life saver for us quite literally. Our son stopped breathing at 10 days old from a seizure and he was having them back to back constantly so he went on a proper hospital version of the snuzza while we were admitted for a week and they NHS specifically recommended we get one for use at home. It never once false alarmed until the battery literally died and it alerted us the battery was dead and it caught all his seizures and meant we didn't loose him again as he has absent ones so they're not always noticeable. He wore it 24/7 for 4 months straight we had no issues like I said and the only time he didn't have it on was brief car trips as on him it sat right under the buckle. The lights bright enough on it too that it can be seen under a onesie and a 2.5 tog sleep sack very easily so when I would wake in the night I'd just check for the green blinking light coming from his belly and was reassured he was still with us. I honestly cannot recommend it enough!
I personally never brought one but I’ve seen The snuaz is the best one and these were used in hospital too