Instruct: Classify a given review into positive or negative sentiment.
Query: Sony Sat - HD300

We purchased this unit 18 months ago. The unit has failed twice. Sony replaced the unit the first time, post warranty, with only a shipping charge of $70. The second time I was instructed to take it to a local repair, $40 analysis, before repair. Seems that for over $600 there should be a better life expectancy. If you buy this unit, be sure to get an extended warranty. Many features on the non HD system far exceed the features on this unit.