Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Dissapointed in Dewalt design

First off, I own a bunch of DeWalt tools.I bought this sander and used it for about 3 hours before returning it. This is a heavy sander and requires a bit of work to use (seems like I'm fighting with it). The top front wheel sets up frequent vibrations which cause the sander to do tiny hops which leaves marks in the work. The dust collection seems to work, but the cooling vents seem to blow dust all over the place (not good for working in the house). This sander seems to go through sanding belts with little to show for it (don't know why).I switched to a Bosch 3x21 inline sander and it is a world of difference. No great effort to use (less fatigue) no cooling ports to blow the dust around, seems is use less belts for the same job, a whole lot lighter and does a better sanding job.