Garmin Mobile XT v4.10.80, 6.6 Olympic version of the map, Route66 Mobile 7.3.545, 2007Q3 map, Keliad 3.0forS60 third version of the spring 2008 map. Google Maps 2.0 ForS60 1, the use of the actual test in the open state, in about 45 seconds, can be realized positioning, Kelilong can be found, Google Maps, Garmin to find the fastest star speed, R66 to find the star speed is not good, but also broken. garmin is the most stable, did not see the interruption. The number of stars found is 4-6, stable at 4-5, basically can realize positioning. In terms of the accuracy of the map, Garmin is the most accurate, and also prompted to download traffic information when positioning, in order to determine the smoothest but not necessarily the shortest road. In terms of detailed and localized information, Keliad is the most detailed. It is easy to search for points of interest such as restaurants and gas stations. Google Maps depends on the user's calibration on google maps. The information is relatively minimal. However, it does have some information that is unlikely to be found on other maps. R66 map medium, not obvious. 2, positioning time and signal Garmin fastest 40S or so completed, there is a signal interruption, Keliad center 1-2 minutes or so, there is a slight drift (10 meters or so). r66 initial positioning time is okay 1 minute or so, the location is not very accurate, there is a heavy drift, the delay is more powerful. It took a while before it was more accurate, with several signal interruptions in the middle. google maps is not accurate anyway, and the words "searching for satellites" often appear. Garmin is the best when it comes to accuracy of route mapping, and offers a walking mode that makes it easy to navigate through city alleys and walk and bike tours. Keliad is not very responsive when you don't follow its instructions. 3. Cons: Garmin does not have point-of-interest lookup. Some featured place names such as Jiangsu Provincial Party Committee, Provincial Government such organizations are missing. Keliad query is convenient, but there are small place names and road name errors. For example, the two roads next to the home, are treated as another road through the long road (three roads are connected in a straight line) google maps did not find such errors, but the point of interest information is small. r66 this version does not provide such a search. (It is said that the 2006 version of the map support and very convenient, but for some reason in the 07 version but canceled). Google map accuracy is poor, with GPS 600 meters, no GPS, you can also use mobile base stations to locate, but the accuracy is: 2400M, alas, as a general map check. 4, the degree of ease of installation: google maps is genuine, the most convenient installation, an installation can be used. Keliad is also very convenient, first copy the map folder to the root directory of the card, and then install the program can be used. R66 is almost as good as KLD. Garmin is the most complicated, with a lot of steps. The program has to be handled and so do the maps. You have to adjust several files according to your own production, and you can get it wrong if you are not careful. To summarize, use Garmin for navigation, it is fast in recognizing stars, accurate in finding roads and maps, and it is strong in car and on foot. Query points of interest with Keliad, fast and many results and from near and far to give the distance arrangement, can point directly to the destination navigation. When there is no GPS, google map can be used to locate the reference by using mobile base station. r66, deleted. Hopefully a good version will come out next year. Attachment 1: 6120c machine, power consumption failed to test, feel on all quite powerful, Garmin seems to use more power than the Kelilong. These tests 20 hours used up the power of my three Bl5B boards. Attachment 2: Bluetooth GPS, is a super-long use of 30 hours of this kind, just find the star ability in general, it is recommended to use the sirf3 chip or the Swiss 3 generation chip