I saw mixed reviews concerning wireless modulators, but maybe the unsatisfied customers had bought inferior products. My Delphi adapter has worked well. I wanted to try out the satellite radio system before getting anything permanently installed in my vehicle and this has really helped. It is just a bit bothersome to have to adjust the channel selector while on long trips (as vacant frequencies come and go) but that is a small hassle when compared to the convenience of being able to install my system in any car without having to rewire everything. I highly recommend this product.