Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Power jack in unit wore out just after warranty expired

The first unit I purchased lasted a week or two until it got a dark blotch on the display. I received a new unit with no problem from Radio Shack. The current unit was awesome until just after the warranty expired. Apparently the power input jack is not very durable and now makes poor contact. When I hit a bump or touch the unit it turns off and back on. I didn't buy the life time subscription plan for the simple fact that I didn't know how long the unit would last. Now I'm really glad I didn't. I would have had to buy a new unit and then pay Sirius $75 in order to keep the life time plan going. It's just a big crap shoot as to how long a unit will last.