Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.
Q: I bought this from a local retailer for only $30 (less than 1/2 of the Amazon price). While assembling the wheels, one literally shattered in my hands. I brought it back for a new one and the same thing happened. The third one assembled fine, and the store gave me 3 spare wheels, just in case. I don't know if I would have shipped two of them back to Amazon.It throws quite a bit of heat for such a small unit. We bought this to replace an older radiator of the same design and the difference is striking. I also noted a bit of an oil smell, but that went away after a few uses. All in all, a good heater, but
A:
Positive