Instruct: Classify a given review as either positive or negative.
Query: Unreliable machine

I need to irrigate my sinuses daily due to allergies, chronic infections, etc., but this machine is unreliable. I went through 3 of them in a short time. Every time I called the company, I got the same ridiculous response from their representatives. They pretend that no other customers are having difficulty with their machines (not true, if you read other reviews) and then proceed to try to find something you are doing wrong. Even the replacement units they sent didn't work. For the past 2 years, I have been using Waterpik or Interplak units with sinus attachments instead, and although their lifetime is only 6 months, at least they don't cost $100. I am going to try the sinupulse now that my latest interplak bit the dust. Hopefully it will last longer than 6 months for the $97 I'm going to spend.