I went to a fancy treatment center for 3 weeks. I was even allowed to bring my dog as an ESA. They gave me meds I didn't need because the psychiatry is a joke, and my counselor was awful. Pretty sure they just charged me and my insurance as much as possible.
We couldn't have our phone but they had phone time so I could talk to my therapist (who helped me get there), family, and friends regularly.
This being said, the people I met there and some of the support people were amazing. There were definitely benefits and it helped for a while. Honestly, if I was in a position to do it again I would. If you do your research and find the right place, it could help.