Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Makes good cubes that are hard to remove

There are several things I like about these trays, including the cube size/shape and the size of the trays themselves. However, the silicone material makes it hard to remove the cubes. Sometimes you have to push the cubes out a little and then pull them the rest of the way out. That's not a big deal, but after doing it with two trays in a row my fingertips get a little numb!