Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Pain, pain, and more pain

I waited for these to go on sale, and when they finally did, I took my $7 off coupon and raced to the store. I had used the original version of these a few years ago, and had remembered getting decent results, so I thought this version would be even better.Was it? Well I can't say because I was only able to use them twice before the pain got to be so intense that I could not even drink cold water, or eat anything warm. It was awful. The pain does not occur just around the time you're wearing the strip. It occurs all day long. And not to mention that you end up swallowing much of the gel because the strips make you salivate more than normal. So not only are they painful, but they're also a pain to use. I do NOT recommend these. Try the original version (I don't remember having pain from those).