Summary: Visit the Garmin Connect forum for information on Garmin's recent move away from Google Maps to Bing maps. Many, many user complaints about the switch, and Garmin's response has been to ignore the complaints.
Summary: There is no reason to buy the 705 unless you plan to then spend another $100 on maps. The "navigational" features on this GPS would maybe be impressive if it was 1492. But if you already know what continent you are on, then the satellite/basemap is useless. So you can either get the 305, and save several hundred dollars, or be prepared to send Garmin more money before the device will perform any of the functions that the 305 cannot perform.
Summary: I bought the edge to navigate a charity cycle ride from Cheltenham to Paris, purchased with city navigator Europe, planned route in mapmyride. It got me to the destination (eventually) The 705 broke the first time used, the rubber waterproof cover to the USB port feel off. The unit takes a lot of getting used to, if you take a wrong turning and allow the unit to auto re-calculate the route then you will be waiting for 15-20 mins with a blank screen and then the route...
Summary: Well, it navigates alright, ie it picks up satellites etc. You definitely need to download a map or get an SD card as the base map it comes with is a complete waste of time. But the real problem with this is the appalling quality of screen and graphics. When we're all used to iPhone standard mobile clarity and Google maps, this device is closer to a 1973 arcade game quality of graphic. Huge pixel size makes everything harder to read.
Summary: I quickly found with this unit that the acompanying documentation is totally inadequate. Having tried many times (in all different configurations) the Heart rate monitor only works for about 10% of the time, somehow telling me my BPM is 39 going up a 1.3km 12% gradient is suspicious to say the least. It is almost impossible to change your destination whilst out, unless it's an address or post code. Impossible to set a destination as a map reference or OS ref.
Summary: I bought the device to plan my cycle journey from lands End to John O'Groats. I needed a product where I can export map data from mapping software to the device (i.e. Anquet Maps to Garmin Edge 705). This feature allows you to upload specific map information to the device and then you can follow the route whilst cycling. It appears that this feature is NOT available in the Garmin Edge 705, although this was available in Garmin Edge 305.