I think we are about 8 months in. He dropped the nap about a month ago, but we're not home and dry yet, still very much adjusting. He had a car nap at the weekend and is currently napping now (but is not well so I think it's more down to that). He's still so OT, if I can get enough early BTs in in a week then we can have a couple of good nights but it's not long before he's OT again. I think we're still going to be on this road for a little while yet.
Like Sian, I think it'll be the best part of a year for us too by the time he's settled on no nap and sleeping well at night.