Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Worked as long as I never moved (!)

The best thing about this item for me was that it was ridiculously easy to set up. Really, there was almost no set up it's so simple. Negatives include the high cost. Further, the signal I got was no better than with the XM antenna included with my unit no matter where the Delphi antenna was placed. Worst of all, it only worked for me if I didn't move. Sounds bizarre I'm sure, but this got a decent signal if I sat in my family room and never moved. Soon as I stood up and started walking around, even into a room 20' away, the signal dropped out and became intermittent. Maybe metal in my body from past surgeries was affecting signal (?) In any case, a total disappointment in my home and glad good ole Amazon has a great return policy.