I've used it for both, night wakings and early wakings.
For night wakings, was when ds was around 13 months and started to wake at 12 and 2 am and each waking was taking up to 1 to 2 hours of hysterical crying to resolve. Then i started sleeping on a mattress next to his crib and he'd still wake at 12 and 2 but seeing me next to him would get him back to sleep. If i attempted to leave the room before 4 am he'd freak and would be restless checking on me to see if i'd still be next to his crib. So i thought this is too much and just like that one day i went into his room at 11 pm rubbed his back and tickled him till he sort of whined and protested and then patted/shshed him and off to sleep he went. Then at 1 pm i did the same to prevent the 2 am waking. Did it for 4 days and he stopped waking for a week and then back to his old habits. Increased the pain releif dose before bed (by then i'd seen a molar popping in) and we forgot about the wakings... FOR A WHILE LOL...
So in that case i couldn't say if he stopped waking due to the wake to sleep or the pain aid or a combination of both.
Then with the other 3 molars which decided to pop all at once, a couple of months later, he'd be waking at night and waking SUPER EARLY in the mornings. I resolved the night wakings with the mattress thing (i couldn't increase the pain releif more
) and the early waking i did wake to sleep but it wasn't working till i realised ds was STARVING by then, so i started doing like a dreamfeed 30 mins before his usual early waking. I still do it
now cause if i don't, he wakes extra early and grouchy. I just go into his room, sip a bottle and he drains it in his sleep in 5 mins or so. He sleeps for a good extra 2 to 2.5 hours.
HTH!