That Misol is the same thing as the Ambient Weather WS-2902A. They are both clones of Fine Offset WH2900. Firmware will be maintained by each supplier separately. One difference is that the Ambient Weather version includes upload to Ambient's private cloud. Not sure if the Misol has a separate private cloud. They both will upload to Weather Underground.
You wouldn't want the Ambient version if you are in Europe because you might have problems (interference) with it as it is configured to run on 915 MHz instead of 433 MHz. Not to mention it would probably be breaking some kind of broadcasting law so you could be the one causing interference to other services in your country. The frequency is set at the factory which is why nobody will sell and ship across the big pond.