I have bought this product for using it as a watch. It is a nicely designed has a very small form factor. It comes with the application named "Intex Fitrist" which is available on google’s play store.
I am using fitrist for almost three months, it is so light that sometimes I forgot that I wore this thing. Its measurements are accurate if you enter parameters correctly into the application.
talking about hardware it is very sturdy design a it is waterproof(I have tested it in the rain also no problem at all at hardware side) but the software side is not as remarkable. the software lacks proper customization and synchronization.
overall product is very good and offers a great functionality.