I have one. I got it last year, and while I haven't had as much chance to use it as I would like, I am pleased so far. It seems to work well both to improve signal strength and minimize the effort involved with getting multiple devices connected to a campground network. My intent is to use it with campgrounds that have a week wifi signal at our campsite and for the occasional stop in places like Walmart or a Harvest Hosts site where there is only marginal WIFI in the campground.
I probably made some mistakes on the external antenna setup. I got the "super long range" 65 inch antenna and a 30' coax cable because I didn't know exactly how I would set the antenna and the repeater up. Looking backwards, I would probably get the shorter antenna and only use a 20' coax.
I attached the antenna metal receptacle to an 18" piece of PVC pipe, the antenna attaches to the metal receptacle with a small set screw. Then the 18" piece of PVC screws into a 6' piece of PVC, which in turn slides into a piece of PVC that is zip tied to the tongue jack. I end up with an antenna that is about 12' tall off the ground. I had Reace put in a port like the one used for a permanent electrical cord. I can snake the coax in the port, run it under the bed, and then have the repeater sit on the table at the end of the bed. Eventually, I would like to figure out a slicker way to do this, but so far I haven't had time to do a better installation. The trailer is buttoned up until we head south in a month or so, so I don't have photos. If I get a chance to take some this spring, I will.
The repeater can be used without an external antenna, but the range isn't nearly as good.
I wish I could give you a more informative review, but now know about as much as I do.