The remote isn't that useful, but since it connects to the iPod and effectively wirelessly streams your music, I've found it was unnecessary!
The Car charger is a neat idea, since the transmitter uses up your iPod battery more quickly than headphones or a 3.5mm jack.
The product itself means you can play your iPod through anything with a FM radio, so cars which are too old to have an iPod aux cable, CD players or even my grandma's 80s cassette boombox!
Connection and music quality is best when still, away from things that can cause interference (phones, computers on WiFi, some metal objects), or generally put down still when music is selected. You must tune the radio to a frequency where there are no broadcast radio stations (so you hear just white noise) and then use the up and down buttons on the product to try and match to the channel. If you choose a frequency with a station already on, when you move the iPod, it will occasionally jump to that stations music for a second!
On the whole, decent kit for a good price (nothing as special as the top range ones, but c'mon - it's less than a tenner) which means you can enjoy your music without having to upgrade your radios!