Yes, ever since I was downloading a huge file (on Dialup) and just before it was going to finish, a car hit a telphone pole down the road and my lights blinked a little and that was the end of my HD, within an hour, it was toast.
I've had three of them, all APCs, each bigger than the last one, I think the one I have now is a 1000w one, but I may be wrong. My last one got nailed by a huge lightning strike out in my yard, and it was smoked! The modem in the PC connected to it was gone, but the PC booted and runs ok with the same odd crashes it had before the hit. The UPS was all black in the back, and the phone cord was cooked, black and crispy, and the phone cord plug had melted into the UPS so it couldn't be removed. It was about time for a battery, so I wasn't too upset about it.
My friends have had good luck with both APC and Triplite.