Since the heart rate monitor from P ... has given up the ghost was needed replacement. After some research, I came across the Suunto M1i. What can I say, for the price the clock is fully in order. Relatively simple operation and easy to read display are for me the most important thing at each clock, not just for the sport. What I feel is very convenient that the chest strap is understood with the cardio equipment in the fitness center, which I visit from time to time because I do not always look at the clock when I want to read my Hf. What I'm missing is a backlight, which is dissolved better in the competition. Among the faults I can not say much because I rarely out the clock but rather insets in the studio, because there have been no problems. What I find very positive, is the more subtle design, so I accompanied the clock in everyday life. Although the clock will not be spared, it shows no scratches in the display what is on other models criticized often. As a huge advantage over the competition, I see the clever energy saving function and the ability to change the battery yourself. That cost me at my other clock over 20 and took a long time. In relation to the price, I think the clock has everything an amateur athlete needs, in this segment, I have found nothing. Only the non-existent display lighting is a point deduction.