I recently got this car CD player on offer in Halfords, and considering the price I am very impressed! Not only does it have the CD player and radio, but allows you to plug in an iPod/mp3 player with a standard Aux cable, which some cheap and basic CD players often do not have.
The CD player is easy to install though a little fiddley, and you do need to check that you won't need any extra items from the store, depending on the make and model of your car and whether you're replacing an old casette player, as in my case. However, if you buy from a car shop they'll be able to help you find what you need. You'll probably only need around 2 hours maximum to get it in place.
Furthermore, the CD player is easy to tune, and easy to use. The instruction manual is clear and simple and printed in several languages.