I'm looking to get some UPS's for my PC's, mostly for surge protection, I don't need the PC to remain on for the duration of a power cut, but a few minutes to shut it down properly would be nice. So with that in mind who has used Tescom UPS's? They are quite a lot cheaper than APC but there isn't much info on them, Esquire stocks them but not much info is provided, are they reliable? Can I trust the surge protection to work?