The Garmin c550 is my first and only sat nav and I have no gripes with it I think its a decent bit of kit, I cannot think of any extra features you would need to have in a sat nav system. It has security features so when you turn it on you enter your pin if you forget it then it will unlock when you reach your secure destination which you set when you first use the device. I have mine set for a friends house rather than my home as I figured if my car gets stolen they are likely to have my car keys and house keys so at least if I get completely robbed the sat nav will be useless to them! You can insert a SD memory card and upload your own music to ...  Read the complete review

I've owned the Garmin Streetpilot for a while now and used it many times. The unit comes with a holder and suction cup which can attach to the dash or the windscreen and the power cable is plenty long enough to reach the cigarette power socket. The Street pilot also has a SD card which can be updated with maps from the internet. The screen is quite a good size and touch sensitivity is responsive and acurate. I've never used it for speed camera locations so sorry i can't coment on this part. It finds and locks onto the satelites pretty quick and once you've input your destination you can be on your way in a couple of minutes. I've mainly ...  Read the complete review