Well my throat was such a state before the op - lots of abscesses - that the wounds they made were pretty big; they had to, to get rid of the mess. My dentist thinks my tonsilectomy scars are hilarious (quote "looks like they used a bread knife in there!")
I was warned it was more likely to get infected as the wound was bigger than usual; and lo and behold it did. Basically I felt wiped out even a week later, plus the wound was still bleeding slightly...saw the GP who said it was infected and to get to A&E.
So I went back into hospital just overnight for intravenous antibiotics and after that I made a rapid recovery...literally three days after that I was more or less back to normal.
Despite that, honestly I would go through the whole thing again if I had to - the health benefits of not having an infected throat more or less all the time were well worth it.
OK, so you're going to have a sore throat and feel a bit shite for a week, but after that you'll definitely feel so much better...permanently.
One last thing: I ended up having my adenoids out as well eventually, and a sinus op, to boot. The reason for these ops was that the infections from my tonsils had migrated up into the back of my nose over the years and had caused a lot of scarring. Yes, even in my sinuses. Who knew that could happen?
Tonsils are little bastards, see? Get rid!
Hope it goes well.
x