Regarding boundaries, I mostly had issues with one therapist and his handling between-sessions email communications and its purpose. He was quite dogmatic and our views often differed, but that's a different question. Did not have problems with any of my two therapists' boundaries in the actual sessions... but I am not a boundary pusher or breaker (more the opposite, I am sensitive to boundary transgressions and careful to not be intrusive etc); so never pushed them in that sense. My first T was very unstable in this regard himself and I had no issues whatsoever with the second. I was thinking though that some people mention the T's changing how much and what type of personal info they reveal about themselves and how much and what type of reassurance they provide to the client. Also how they handle session timing.