I bought this APC unit in 2010 end. Within 2.5 years of usage, there is a board failure and I have to pay about Rs. 2000 for the visit, service and repair. Also, the process for paying and getting the repair done is very time consuming (having to go through the pain of bank transfer, etc).
That too we live in an area where the power failure is very rare (near defence area).
No wonder why this product got so many 1 star!!!