Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Get a good flat rock...

The Good:Turtle liked ability to get out of water. Self-leveling feature kept dock level with water changes.The Bad:Dock tended to grow greenish algae that stained. Attempts to wash helped somewhat, but high effort. Dock had a finish on the bottom that came off in chunks. Turtle decided he preferred the dock to his turtle bone for gnawing purposes, leaving chunks of plasticky (is that a word?) crap floating around the tank. I can't imagine that is healthy for him.Musings: Get a big flat rock that slopes. It looks better, your turtle will like it better, the finish won't come off, and any rocky field is a potential source. It will also retain the heat from a heat lamp, leading to praise from your turtle!