Instruct: Classify Amazon reviews into positive or negative sentiment
Query: there's better ones out there

I've been using heat wraps/packs for a long time for my shoulder, neck, and back pain. This heat back is VERY flimsy and poorly made. Within one week of using it was already tearing away from the seam, i'm just waiting for the beads to spill out. Also, this does not retain heat for very long at all. I've had other heat packs that have lasted over 30 minutes, this one barely get's 10 minutes. I'm surprised at the good reviews. I would spend a little more money and go with the higher quality 'Dream Time' heat packs. I've had mine for a few years and it still works better than this one.