Instruct: Classify Amazon reviews into positive or negative sentiment
Query: COULD be great, but it's not

I've had one of these heat roller sets for years, and the heating elements finally gave out, so I ordered a new set. Sadly, the clips in the new set, that keep the rollers in the hair, are shorter than the old clips, and the rollers don't stay in very well. I wish I hadn't gotten rid of the old clips.