Except for the storm season it's usually pretty good. Nice & steady, no brownouts or blackouts. When we hit late summer/autumn (February to April) then the problems pop up. I could usually expect around 10 complete blackouts in that time, anywhere from a few minutes to 4 hours. I've never lost hardware because of power problems, except for a modem with a relay burned from a lightning strike.
It still worked OK, but needed a phone connected to manually dial
