Instruct: Classify Amazon reviews into positive or negative sentiment
Query: disappointed

I bought this for my girlfriend. I have had two other Smartdisk products which work fine. This unit abruptly stopped working one month after purchase. I understand that products break and this is expected. I am disappointed with the customer support. Multiple phone calls were made to Smartdisk corporation, after waiting 15-20minutes (with long-distance charges) and speaking to different customer rep yielded only false promises and no result. I don't think I'll buy another Smartdisk product.