Hi, the what i am buying for around 10-15 rupees are good only for a few days, but after a few weeks/months they become useless. (including sony/imation/moser baer etc). However, the CDs that came with Digit years back are reading fine till today even though I use them more frequently. The writable side shows a significance difference in appearance to that of the CDs that I (we) buy and use. I want some of my data to be stored on a CD and I want that to be durable (atleast for a year or more). I will be using the CD pretty frequently.