The one I've used was waterproof not weather proof - the diference being; waterproof, rain falling straight down will be excluded, rain coming from the sides will get in.
They are not a tent. No sealed floor, and side curtains are just laced in (not 100%water proof).
A good shelter not a tent. Would be good as a cooking area, drinking area, sitting area etc.
Could be made a 'happy home' for CD5 for a day or two with a bit of throught.