Bests & Worsts Reviews from Amazon

a little expensive but SOOO worth it. this device is a great upgrade to my last polar that lasted 10 years. things you should know, this does not have a battery in the watch device itself, but rather usb charger. if you do it at your computer, you will download the sync application and be directed to the polar flow website where you will have profiles to choose from from yoga to multi and triathletic to trotting for all of those pony people out there. the ability to do this helps keep track of your training, it also enables upgrades to software as polar releases them. like your computer. there are two prices you will see out there, a 229-249 and a cheaper model. the cheaper model is such because you need the heart rate monitor strap(the one that goes around your torso) the f7 bluetooth. yes the gps can be turned off to save your battery. the display is very easy to use not like my old rs200. its also EASY to see especially when your moving alot or have to squint to see. my keiser, spinners and lemond all hook up and sync with the bluetooth on their equipment. so i dont foresee any problems there. I have not used the i phone app yet but will keep you posted how it works its too new, but i am so excited about this device. and im persnickety too i had tried another model of polar and it felt bad on my wrist. this m400 is super velvety on the skin. i have the white, and it too new to tell but i assume it wont look entirely trashy. I am active alot! i teach fitness classes from boot camp to yoga to spin, and heart rate monitoring since i started it 9 years ago changed my habits! i would give this a try, its new and great web tutorials over at polar website view those. i doubt you'll be disappointed in this. i will update this as we go along. ****UPDATE***this is the first update since having it a week. pros: EASY to navigate buttons, i was worried that it would be complex to navigate like my old polar where sometimes two buttons have to be pressed. menus are easily accessed. also because of the inset of the buttons, they don't tend to reset your menu with a sleeve being pulled up or something like that. COMFORT, it seems big, but you hardly know its there, maybe too big for someone with super delicate wrists. accessibility, literally at least 45 options of sports to use in 4 profiles, a-z like archery to zumba and all in between like bootcamp, aerobics, 3 different kinds of cycling, crossfit ect. and multiple options to set your view, from heart rate to max hr levels, timers, time, speed, distance, calories. when your done with the activity, it tells you what kind of training you had. for instance my pilates class is restorative training, while another higher level cardio workout is tempo, max training, or moderate, etc. it tells you max hr, and how much times you spent in your hr zones, how much fat burned out of the calories spent, which goes into the anerobic/aerobic lactic acid vs fat burning systems. you connect this to the computer and it records your stat. CON: since i updated my i phone to its newest platform, im having trouble syncing monitor to the app this is something you want to do unless you want to hook up the monitor on the polar flow site. the app will download the information from you device then upload into the polar flow website. that way you don't have to always plug into your computer. so there for now. its easy, multifunctional techy but not too hard to work with awesome hr monitor polar m400. updates will follow as i see fit. VERY easy to read face even with the light off. but the light can be locked on with one easy button hold as well for dark leave a comment or question ill try to answer. or a thumbs up that this review was helpful to you. ***UPDATE*** 12/1/2014 I did get it to pair fine after a couple of trys, but no problem pairing. so far this has been a very integrated part of my life! i still love it! however, i just changed phones from ios to a android. the connection app for phone isnt avialable yet for android. but i still use the iphone as an ipod anyway so its no big deal yet for me, but it may be for some if your heavy on the phone app. but connecting it to the computer does the same thing anyway.