After using it for a while, my views are ambivalent. I bought it from here despite it being costly but I'm not too happy. No onus is on Flipkart or WS Retail for this. Product arrived quick and packing was very good. I'm little disappointed with the product. The backup is not as claimed. It never was. The first few times I tried it, it never reached anywhere near 3 hour mark. Average so far is 2 hours 17 mins. Plus there's another issue about the battery time fluctuation with this. Sometimes the battery meter would show 3 hours 10 mins remaining then suddenly change to 2 hours 40 mins and then again to some other 2 hour related figure. I'm not sure what to do about that.