what do yo think of this?

Lucid Dream Timer Method: Fastest Way To Have Lots Of OBEs & Lucid Dreams - Lucidology 101 Part 7/12 - YouTube
has anyone tried this method? if so how did it go?

Yupp I have tried it and had much success with it, although when I got the lucid dream either my body or the next alarm on the timer woke me up again. So that was very annoying.
After some time using this I started having trouble falling asleep, and I also ended up tired rest of the day...

But it's still a good method to use from time to time.