I've also found that it takes a long time to figure out how to make therapy work. Your current therapist reflects that progress, I think. As for being afraid it's too good to be true, you can't do much about her health, but have you asked her when she plans to retire? Also, if you've been doing therapy for 16 years, you know there are ups and downs, but as long as it's mostly forward movement, that's got to be good?

And yes--you were due for a good therapist. I'm glad you found one.