Same here we transitioned at 8 months old from sleeping in our room in a side sleeper to sleeping in his own room on his own bed by using the Ferber method, it worked great.

We did soften it somewhat by setting the maximum interval at 7 minutes (we couldn't stand longer than that). It might have slightly reduced how quickly the method works (although we started to really see great progress 4 days in which is in line with the book).v