Friend had one when she was 32 due to severe endometriosis. She has said to another friend who is having one for fibroids so large, she needs to catheterise herself to pee, that it will be initially painful, but, compared to not having one, it's just a couple of weeks and then the rest of her life will be changed for the better. She had her ovaries removed due to the endometriosis over them, did HRT and said her symptoms were just feeling a bit warm for a change, instead of freezing cold.
My mother (who was 48) was so glad to have the fibroids gone and to know they weren't malignant (they were only discovered during tests for agonising back pain, she'd had no symptoms and just got told they'd found a mass), claimed there was no post op pain at all for her TAH, compared to the repeated prolapse repairs and D&Cs she'd had about ten years before..
Another friend had one at age 37 for endometrial cancer. She also had her ovaries removed and, after a bit of weeping because she thought she would have liked another baby (hadn't got round to it in the 18 years since her DC was born, though), is happily on HRT and, more importantly, is still alive.
Compared to everybody else, I'm kind of hoping my insides just shrivel up and stop working with old age, as I was such a wimp over pain from a section, I really don't fancy it unless they offer to throw in a free tummy tuck whilst they're there in any case other than it being clearly lifesaving, when they can take the lot out with an industrial vacuum cleaner, for all I'd care.