I used to work in alcohol services for a local authority/pct as a commissioner. I had responsibility for approving (or otherwise) applications for funding of residential detox and rehabilitation so I saw lots of applications from desperate people, some on more than one occasion. From what I saw people did better in detox and rehab when they had a plan in place for aftercare when they leave the facility. I'd love to tell you that these establishments are 'magic bullets' but they aren't, they are the first step on a long road, so please think about what you have in place for when you leave, before you enter. Also having visited lots of these establishments the general consensus was that the ones with 5* hotel like facilities were least effective as residents felt like they were on holiday and not living their real life so to speak. Some of the best are no frills but keep residents grounded.
Good luck with it, stay strong, listen to others and learn about yourself a day at a time as the rest of your life starts now