Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great while it worked

I bought this player in November 2004. It had intermittent issues including video signal loss, audio drop-outs, etc., thoughthe picture quality was good while it lasted. Around April 2005, the DVD player stopped working entirely after the infamous "Off" error where the tray locks and the disc cannot be retrieved.I am sending it back to Sony to give them a chance to fix it, as I have noticed there may be a firmware upgrade which fixes the problem. If this doesn't work, I will either be requesting a refund of my money or, if Sony refuses to do so, initiating legal action against them to recover my money. It is quite obvious that this product was released with numerous defects, and Sony's QC appears to be non-existent. Clearly a 93A claim is in order here for this defective product.