I have used it. I can see why people dont like it. My friends dont. They tried it with me, but while they liked the "official" stuff (nothing is GW licenced, but there is a pro scene that makes most of the models, scripts and such) like the dice sorter (roll a bunch of dice, it sorts them into 1s, 2s, 3s, etc, and lets you select a single number, everything above it, or everything below it for easy rerolling) and the auto measuring, and the objective overlays, they missed the real world aspect more than they liked the convenience. I personally find the convenience just as good as the in person, but for me the big draw is joking with my friends, so if they dont want to play, I am not all that fussed either.
Its worth giving it a go. Go to the TableTopSimulator warhammer subreddit and join their discord, they have a complete guide for how to install all the mods. I would also be happy to show you some of the maps and army loaders if you wanted, though I wont be playing a game myself.