Once i was a big fan of this method (using multiple alarms with auto-snoose ability and trying to DEILD).

90% of the time, they were successful. in fact, it is an LD method in hand.

it had some benefits:
- As we are not too sleepy after waking up several times, then we remember not to move our body after we wake up.
- also chances to hit the REM sleep is high in this method. out of 5 alarms i used in a day, one of them led to LD (on average).

but they had some bad effects on me=

- headache (because of using lots of Alarms).
- i couldn't have much dreams when using this method (i don't know why).
- i was very tired as the sleep cycle did not end its complete rotation. so i needed one extra hour of sleeping.
- sometimes i annoyed my neighbor and when i heard she said: "that b*itch doesn't allow us sleep with that f... alarm.....GOOOOOOOD...." then i stopped using this method.

but if you are OK with that negative effects, then i swear this is one the best LD method on earth!

good luck!