Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Confusing documentation, difficult in every way.

There are certain numbers and characters to be issued by the various companies that produced this thing for insertion into blanks and spaces in the software. The software recognized only one of the three number/character codes required to enable it to work. The three number/character codes were to be supplied by the login software. It supplied only two of the codes, and only one of those was recognized by the software when I employed them. The customer support telephone is always busy. If the email help desk doesn't come through with answers, the thing is a total loss.