Instruct: Classify Amazon reviews into positive or negative sentiment
Query: So far, so good

Nice heater. So far, works great. I like having the choice of 400W and 800W. Took the advice of another customer and used a marker to color the arrow sight and marks so it can be read from the front instead of turning to the side. I hope it continues working since some customers noted that theirs stopped working. The cat likes it too.