UBNT has also recently released a Unifi based option. Haven't tried those though.
Yes, These are a great solution that fill a very comman gap IMO.
So many building to building links are done with products that were designed for much longer ranges, simply because there was never a solution designed for the smaller ranges.
So those look interesting for sure and could be an option.
I got to see the site and there are quite a few trees between the buildings so this may not work.
It might be better fore to just blanket the area from a single focal point.