The unit was relatively easy to install, although instructions were minimal. The radio works well, but AM stations are difficult to receive, even with an optional antenna. Just after installation, the CD quit working and would not eject the CD. Afer discussion with technical service, and trying suggested remidies, I shipped the unit to St. Louis for replacement. I am awaiting the new unit. If it works properly, I will increase its rating.A new unit was returned to me about two weeks after shipping the defective unit back. The new unit seems to function properly and I am therefore giving it a higher rating of four stars.