In the context of silnylon tarps and the crazy prices they command, these look a bargain. For example, my msr e-wing cost £45 and is much smaller than the rig 7.
What suprises me is the weight - 500+ grammes seems a little on the heavy side. Compared to my dd tarp mk 2, which is around 850g (in reality) for 9msq it's not the improvement I'd expect. Though I go notice the stuff sack is labelled cordura, which if my kecks are anything to go by isn't light. The attachment points look a nice design for those of us using walking poles, though.
All in all, I think I'm going to get one. It should be light enough to just leave in my daysack for hill/mountain walking, but big enough to bivi under. Not sure it's a bushcraft bit of kit - but then it's not trying to be. You might as well ask how valid a pair of spandex hot pants are for bushcraft (who hasn't!). But £45 for a devent size silnylon tarp is good value.
Cheers,
Cloughie.