Purchased an SSD upgrade for my laptop (model specific) from Kahlon, tried to clone my drive, long story short, the SSD is not recognized and it crashed my computer into 'the blue screen of death'. To get out of it, I had to refresh my knowledge of DOS from 20yrs ago. That took a few days. But that part was probably my fault. I should have tested it before relying on it. Every company can have a dud from time to time. Now, I am in my 2rd week of trying to get them to replace it, and they are not responding to my mails. It seems I may have lost $150 to a faulty product.