Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Item not Mac compatible; did not work with PC either

I am a Mac user, and I was not aware this product was not Mac compatible when I purchased it. I proceeded to try to get it to work with 2 different PCs; it never worked. I am really excited to use the skype phone capability on a real phone, but am very discouraged by the performance (well, non-performance) of this product.