Watch Polar RC3 GPS .... A little research, a few forums, and comparisons ..... lucky to have a friend who has one (and who lent me) Finally, two other acquaintances running with Garmin and Suunto one for the other ....... For my part, I have a Géonaute onMove 100 for 2 years. That is to say that I do as my distance, speed and course to my outings on .... also a great tracking interface to my taste of course (Géonaute software). With this material I "capped" at 3:57 on 42.195 kms ...... Maybe also for psychological reasons, I feel that I need more data on my outputs: HR and direct data for my training ... With RC3 GPS (in fact, purchased "naked" but complemented by a belt and a CF sensor offered by a close), I find myself in the end with the features I sought (long runs in both campaign and training for Marathon by year) for a lower price than the competition (in equal functionality). The settings are simple if we take a little time to read the manual online .... Then there is only to choose its monitoring screens. Initially, FC sensor is found in less than 10 seconds and the GPS signal in less than one minute (for my part I leave the show asked motionless on a flat plane in open area and the signal is found in less 30 sec) ..... and go for a bit of sport. The size of the screen is very readable with three information lines that are identified easily. I pass on the "nit-picking" of users on some forums who find the GPS signal "is slow to be found" (but never say research conditions of said signal !!) or on the side "not total waterproof "of this product (compared to the price ...). After, I share the opinion that hope that future developments will select the data that appears on the views of screens. Late in the session, the site "PolarPersonnelTrainer" offers a fairly nice track for me ..... even if the top is the ability to also export the sessions on my software "Géonaute" which contains more than three years of data I have a hard time separating me !!). In summary, if I do not meet Pb reliability over time, I found a rather complete product, easy enough to use and in the lower price range of comparative I could do. I repeat, this is the best features / price I found (169 !!!).