Sleep consultants

Anyone here use one? Just looking for general feedback, we’ve read the books, worked a lot and kid just still has a hard time getting himself to sleep (he’s 2 1/2) and we are tired of the holding him to sleep/getting up in the night to get him back to sleep.

She contacted some company called Luna bella and it seems like a good idea, but just wondering if anyone had used them or any other consultants and their experience

(Not looking for advice to get the kid to sleep better on here)