There are numerous posts on this topic. I have written in some detail before. Bottom line, I own the DreamMaker and RemDreamer. I like the RemDreamer better as it's sensitivity is adjustable (for REM detection). I personally found my mind getting used to each though. Over time it got to the point where when the lights went off, I would simply wake. I'm a very light sleeperr though, so your results may differ.