I know of friends who were on birth control to stop excessive bleeding because they were anaemic and it helped them immensely with that. They were less fatigued and had no cramps. On the flip side, I have had friends who took birth control pills for non-medical reasons other than to prevent unplanned pregnancies, and it had bad side effects like mood swings, sleep and issues with appetite. They came off it and took other non-hormonal contraceptives like the coil because it just didn't suit them.
Generally, you won't really know until you take it. Like every over-counter medication like paracetamol, birth control pills will also has its positives and negatives. Your doctor should go through all the side-effects of taking the pill so you will be well-informed by a healthcare professional before you take an informed decision. You have autonomy as a patient and you can decide if and when you want to take them. Ask them all the questions you want - it's much better than on TSR because it's accurate and up-to-date!
I hope that helps.