I have this item for two week now and so far I can say I be pleased with some watch out . the watch be small and lightweight -lrb- consider it have a gp -rrb- and the basic function work perfectly . most positive feature be : 1 . fast gp pairing 2 . once you setup , the information be easy to read 3 . simple upload to the Training Center software on the other side , I have many reservation with the touch bezel ... I imagine that a gp watch should be make for people that be use it for advanced training -lrb- multi-sport and\/or off road training -rrb- . I do not notice that the watch be not intend for swimming , for instance -lrb- yes , it be not water-proof -rrb- . and , although the bezel sensitivity have increase substantially versus the 405 model , sometimes it be a pain to use it with bike full-finger glove . since I also do lot of trail-running and adventure racing , I also acquire the foot pod and the bike sensor -lrb- to guarantee longer battery life and to avoid lose gp signal in a dense part of the trail -rrb- . so far both be work just fine . I also believe there be too much complexity on the setup process -lrb- training page , shut down operation , accessory calibration , etc -rrb- . I still could not find a place that summarize how much time I spend in each Heart Rate zone in a give workout -lrb- my training be mainly base on this -rrb- . the bottom line : very good equipment with lot of easy to ready information : pace , distance , hr , elevation , speed and all the detail for a better training plan . it have some opportunity in term of complexity and interface . I still think it be one of the best gp enable hr monitor in the market . UPDATE : after a couple of week I will give it a extra star -lrb- from previous 3 star -rrb- . the reason be : 1 . I manage to manipulate the bezel with full-finger glove . it take some time but now I be able to do it . 2 . I finally manage to find all the information I need in the Training Center -lrb- specifically how much time I spend in each hr zone -rrb- . it be under the ` total ' tab . the lack of the 5th star be for the complex setup process and for not be waterproof .