Please see the most recent updates in the "Where did the .com name go?" thread. Posts number 16 and 17.
The least attractive part of this addon is the same thing that I never liked about their weather simulations in previous sims - that being the sudden weather changes every time the latest weather information is injected. It completely kills the experience/immersion. The default live weather in MSFS right now is not perfect, but at least the weather changes/develops naturally and with no sudden changes. As with nearly everything in MSFS, Asobo is still working on it/fine-tuning it, and we haven't seen the best of it yet. I'd rather be patient than spend money that might be considered wasted in the long-run.