Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Beware of defective drx-510ul

I become one of those unfortunate customers to get a defective drx-510ul drive.I am a amateur photographer and wanted a dvd writer for backup of my digital images that run over a 18 GB bow. Bought the drive two months ago used it to burn over 15 dvds, like twice a month couple of dvds. And one fine day the burn process stopped. I tried installing all the latest updates of Record Now, My DVD software the firmware etc. I read somewhere that drx-510ul has the same internal drive as the DRU-510A. Apparently lot users who bought that also have same problem Hope this helps with your buying decision. If you buy test extensivly during the first 30 days or the return period.Pros: Fastes drive Yet. Dual interface (iLink/USB)Cons: Stopped working, defective drive.-