Web whatsapp is a the best way to operate whatsapp on windows .we just have to open whatsapp.web in our pc and scan the QR code from our mobile so that we can use our whatsapp in our pc .It is very easy to use and it doest require any extra software to install .It is easy to me because somtimes typing in laptop is easier than typing in mobile phone.
It is also easy to send files like pictures and documents etc using whatsapp.web from our pc.
but the only disadvantage is we cant send videos form our web client.
and since we have to connect out mobile phone all time to the internet intend to use the web client it makes no sence to create web-client