i've been in 20+ times (lost count) over the last 2-3 years. it can help, but can also be horrible. i can think of times i went in and it kept me safe and i left feeling a lot more stable and able to cope. but there were times i'd go in and then after a while they'd let me out then that day or the next day i'd attempt suicide and then they'd lock me in high dependency unit again.

so i'd suggest talking to your T about it in details about what your goals while you're there are and how staff can support you in them. also have a specific goal as to what things will be like for you to be discharged. either set a time frame or i will feel X and be able to X and X. not just i'll feel better.

good luck.