Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: very dissappointed

I had a product like this before but unfortunately my sweet dog ate it. I bought the car kit and receiver separately so there became a little bit of a hassle of 1. finding compatibility, 2. parts overlapped some things were doubled, lastly the instructions were a little difficult to follow. This may be more of the manufacturers fault but from now on I'm asking someone behind the electronics counter what I actually need rather than going back and forth piecing parts together. My XM is still needing more parts.