Just reached level 25.
It took me about a year and a half.
There's not really anywhere to go from here in the course, is there? I think I'm going to stop practicing this tree at this point. I still have a ways to go on the English-for-Romanian-speakers one. Plus all of the other practice I do. I'd say I have this material pretty well internalized at this point.
Thanks Duolingo/Romanian team! I don't think I would have ever actually studied Romanian if it weren't for this course. It's a very cool language and I'm looking forward to putting it to use IRL in a month or two.