Yeah, the Sonic bomb alarm is a really good one, if you want a similar alarm that looks more discreet like a normal alarm clock, this is the version that I purchased for myself. I'm a super heavy sleeper though, and I've found that I can even sleep through that, so as a last resort, I would definitely recommend a Pavlok but again only as a last resort, it's kind of expensive and literally shocks you awake, but I find that it's really effective and quiet. I'm going to sound like a total shill here for a second, but their customer service is top notch as well, when mine started having issues, I reached out to their customer service to see if there was anything that I could do to fix it, and after walking me through a few unsuccessful attempts, they sent me a brand new one. I was really impressed.