My OH was a T3a downgraded from T3b. He had a RP and has no regrets at all. Yes there are side effects and it is well to,remember that while the majority of men improve with them, some don't.
He was of the same mind, just wanting to be free of cancer and sod the side effects. His attitude is still the same now. Urinary continence is getting better all the time and now he is pad free except when he worries he's going to get stuck without a toilet but it's really just a confidence thing. But even when he was still using pads all day, he said, if this is what I have to put up with for ever, then it's a small price to pay. But as I say, he's now pad free. He also supports the saying....there's no sex in graveyards. So for him he has brushed them off easily. Not all men feel like this, this is why it's,such a personal journey.
Very important if you go for surgery, is your choice of surgeon. You can use the BAUS website and check what your local surgeon is like. You need a high volume one, 100 per year and one that also does a fair amount of T3s. You don't want one who specialises in T1 or T2 and doesn't touch 3s. Our surgeons greatest percentage of work is with T3 so we felt confident going in.
Within 6 weeks you will know whether the surgery has been an success, in the form of undetectable PSA ( of course you have to join the 3 monthly stress we all 'enjoy' of subsequent tests.
Also you get the histology result, which tells you exactly what you had inside you. Some men are bang on the same as the biopsy, some are upgraded and a few are downgraded.
I am not an advocate of one treatment over another. This was just our path but it's been ok so far. Today he was re roofing a 10m kennel hauling heavy duty tarp about, so life does go on.