Tim A.wrote a review of Big Agnes Copper Spur HV UL Series Footprint on March 4, 2017
Familiarity: I've used it several times
If you have spent the money on a tent, you want a ground cloth. This does what it should. I think it is ridiculous that you have to spend that much money on a ground cloth. I can't think why you would spend that much money on a tent and not protect it, so just include it with the tent and bump the price a bit.