'The more complicated the plumbing, the easier it is to stop up the pipes. Also, Q8Pilot did a nice review of the SkyMaxx Pro package-view here. I would suggest looking at what Xenviro may look like in the upcoming upgrade by checking out.

Take much of that reporting with a grain of salt. Will be very curious what the upgrade to Xenviro will look like-When you look up the 'best' weather add-on for Xplane you will read all kinds of negative reports especially with Xenviro and lots of praise for ActiveSky (I believe because of its track record with the other flight sim software). I am very pleased with what the clouds look like in the SkyMaxx Pro package. However the package is the most costly (around $105 or so and their clouds do not go to the horizon when flying at high altitudes-FL200 and above-at elevations for general aviation the clouds look good for going to the horizon. My present favorite is the SkyMaxx Pro package-creates the best clouds out there and places them in the proper place. This means no clouds to the horizon and the use of Xplane clouds-which in my view are only so-so. ActiveSky injects better real world weather (which includes better winds and cloud placement) into the Xplane default weather, but does not change the default Xplane clouds (they say they hope to inject their own clouds in late 2019). Plus the clouds look a bit cartoonish (the beta 1.10 views look much better, but won't be available for another 2 to 3 months or longer?).

Xenviro has clouds go all the way to the horizon (no other weather add-on does that for Xplane), but Xenviro has problems creating overcast skies and will not allow you to create your own weather. Presently, I feel the SkyMaxx Pro is the best real looking weather package available for XPlane 11.25. I have Xenviro 1.09, ActiveSky, and the SkyMaxx Pro package (the package includes FSGRW with weather connect).

Active sky xp vs skymaxx pro