The lack of reviews on Amazon speaks volumes.
I fought with trying to get by with wifi and here is the net net; If you do a speed test standing near the antenna or in the office when registering and it’s slow, all the antennas and booster in the world won’t help. The campground has slow, overloaded wifi. If your site has a weak signal, the booster might restore it to the crappy baseline.
Enter Weboost RV cell antenna. THAT made a huge difference. I streamed several months last summer at several locations. It would take a weak .5 MBs rate and boost me to 5-20 MBs.
My Kharma ran over my Dogma.