I bought this product at the end of March knowing about the 90 day guarantee.  About 2 weeks after the warranty was up, the motherboard went out.  I tried contacting the vendor questioning the quality of their product (again...motherboard...2 weeks out of warranty???) but they didn't even respond to my e-mail.  Not only do I question their quality but I also question their integrity.  DON'T BUY FROM THIS VENDOR!!!