@cardinale how is your fly trap working out?
Since it fits in with this thread (and I ordered it because of the discussion in this thread), I want to post a review of the fly cage trap. (Which is a different brand than the OP was talking about.)
We owned a home built box biting fly trap for lots of years that served us well but had started to fall apart. Mr. Trub decided it would be easier to buy this fly cage trap than to rebuild our unit.
The fly cage trap is basically a mini pop-up tent with well placed netting and a hanging ball.
It is easy to assemble (there is a video on their website, there were no written instructions in the box and nothing in the box to tell you to go to the website). Light to move about once assembled (something our home made box was not). Easy to stake down and has stood for some pretty nasty winds.
We put it out by the pasture fence. Not near any official bodies of water, just between the pasture and the barn.
We had our first resident with in minutes. It has caught so many biting flies. I am very happy with it so far.