I bought one of these recently from Holux UK
http://www.holux-uk.co.uk/holux-gpsport-245.php?it=173
The GPS is very accurate and I love the fact I can see my routes in Google Maps/Earth or export them to Anquet Maps etc.
Works well as a bike computer with nice large numbers that are easy to read while riding along. Unit can cycle through the screens automatically so you don’t need to press the buttons. Also love the fact it run with the backlight on all the time so unlike many bike computers you can use it for training at night.
At £55 it is quite a bargain compared to other cycling GPS units and if you don’t want to pay top whack its perfectly functional