Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Here today, gone tomorrow...

I went looking for an adjustable grip exerciser at the local sports store today and found this one. It looked like a good deal. However, when I removed it from the package I was dismayed to find the the rubber block stretched-out on the first rep and subsequent reps did not have the same resistance. Same thing on the other two included rubber blocks. I'll be returning it to the local store tomorrow.