I have that one - I got it for practically nothing. I ONLY use it in the summer for my broody hens. Normally I use heavy robust henhouses and sheds for my birds.
It is made of a really soft wood. Interestingly I had the pressure washer on it at the end of the summer, while being over zealous ended up shaving the wood. Looked like I had taken a plane or saw to it! The cats have used it as a scratching post, so they have made deep scratches in the side.
The toggles used to close the nest box at the end would have to be replaced with a bolt, I was finding it hard to use them as the damp made the wood swell. The side falls down towards you so if you kneel on it accidently you will go straight through (like I did!) This makes is hard to clean, you are practically on the floor!
However, it is very light, which is good, bear in mind a fox would have no problem lifting it off the ground as I can pick it up with one hand. For a broody house it has been good, easy to take apart to disinfect for subsequent mums and the small mesh makes it safe fr chicks. I had it in an electrified area with the edge protected from vermin.
I wouldn't put full size birds in it though, maybe a couple of very,very small bantams!
![Huh ???](https://chat.allotment-garden.org/Smileys/green/huh.gif)
On the plus side it was simple to build
![happy :)](https://chat.allotment-garden.org/Smileys/green/smile.gif)
My advice would be go to a specialist maker, get a decent house and make the run yourselves - there are a few places that sell good sectional aviary type panels which you can with little effort fit your house and garden. If you make the run "walk in" height all the better!