Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Good product and essential for long trips

SO far this has been an ideal product for transmitting on FM signals during long car rides. The only fault I find with the gadget is that on heavier models of Ipod (I have the 20GB) the holder tends to "slip" a bit in the lighter jack. I'm sure it works great with some of the smaller ipods and stays where you want it. Other than that an excellent product at an excellent price. Delivered well before I expected it.