Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Lousy tech support and poor documentation

First off, this item doesn't work with multi function machines. This minor fact isn't shown anywhere on Amazon.com, and was only revealed to me by Linksys after pulling my hair out for an hour trying to set it up on my own, and then another hour going through all sorts of things with one of their...techs. Finally, the jerk asked about the printer, and when I told him it was an HP 4 in 1 laser machine, he said the two won't work together. Fortunately he wasn't nearby because I could have choked him!