Used this on a recent camping trip, where the sun hits the tent fabric you can feel the fabric become hot. Where the reflective cover is, there is no such heat on the fabric. Overall seem to keep the inside of the tent a lot cooler, certainly will be packing it on the next camping trip.
If worried your tent will become a mini beacon of reflected light, simply tie an extra piece of garden shade cloth/fabric over it, still works very well, if not better (especially if you can get gaps between the layers). Not sure will make any difference if camping under a very shady tree.
Braided ropes on it not cauterized, soon became un-braided, which was a bit annoying but easily fixed with a lighter.
Gave this a 3/4 star, no reason to doubt it going to fall apart (yet) but only used it once so long lasting endurance is not known.
Unfortunately we have run out of stock, for this particularobicred R37 item.