APC - their first version was EXCELLENT. Not sure how many seen it, I have it at home, slim, white color. Bought it 5 yr back I think, changed only battery, no problems for other parts.
But they introduced 'Indian version' after that and I think the first model is no more available. I used the Indian ver for some time too, thats black in color, can place on top of table, less weight etc. Personally (and from the APC service centre people), this version is inferior to the first one and may have complaints very often. Sure they will replace the UPS very fast (in my case, they replaced it in 12 hrs ! Just a call to their bangalore office - toll free - next day morning they came with replacement UPS - thats to my office in Cochin, Kerala).
I do not know whether they rectified the problems of the second gen UPS, please check with people who bought it last yr / this yr. Meantime, if you ever get the first type, evenif it is second hand, go for it. I strongly recommend it.