This coospo heart rate monitor and chest strap was purchased from Ebay and was a great price compared to the big name brands. I checked a few reviews on Youtube and they all spoke positively of the product. I have only been using it for a few weeks but so far it has linked up with both of my cycle computers which are different makes, my Garmin watch and also the static cycles at the gym I use without any issues. I can't comment on durability but I have owned two big named brand heart rate monitors which died within two years no matter how many fresh batteries I inserted so was reluctant to shell out their costs for replacements. I could buy at least 2 of the Coospo HRM for the price of the above mentioned products so if it lasts at least as long as the others I am still quids in but I have high hopes of this little device. All in all, so far so good.