What is Reddit's opinion of Urban Farmer 48x48x80 Reflective Mylar Hydroponic Grow Tent for Indoor Plant Growing?

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Oo now I feel kind of dumb, I have a similar tent https://www.amazon.com/gp/product/B01FIJKPMU/ref=oh_aui_search_detailpage?ie=UTF8&psc=1 and it didn't occur to me that the floor is already "flood-proof"... can I really trust that piece of material to hold water, it looks kind of shallow?

(my mistake with the container I tested is I left it outside of the tent for one night because I was going to transplant the next day)