RipstopBTR is an awesome site and their products are equally as cool. Always perfect condition and as advertised. Their customer service is second to none.
I used it last weekend for an overnight backpacking trip. I used it as groundsheet for me to sit on and put on my backpack on. For the night, my hiking buddy did not bring his extra tyvek sheet to put his backpack on, so I loaned it to him as I could just put by backpack in my tent. It's very sturdy and waterproof. I am happy with it.
It is very light and good fabric.
Great material to work with, easy to make dry bags out of
Basically my project was based on dry bags for bike packing. Wanted something durable yet light. Light and durable is what this is. Still haven't had a chance to try them since the snow continues to fly. Still recommended just by ease of use and feel so far.