Instruct: Classify a review into positive or negative sentiment.
Query: Excellent DSL Modem - Zoom X5

My Verizon issued modem, became defective, after over a year. I have bought several DSL modems in order to find, which works best. The Zoom 5654 is head & shoulders above the rest. It does have a burning smell, which I assume will go away as the modem ages.