I usually get more than 80% efficiency with BIAB while the majority of the conventional tun brewers are reporting 65 to 75%. I can have my beer in the fermenter about 2 hours earlier than most of the conventional tun users. I don't have to buy, modify, store, and clean a cooler. Other than those minor points they should be about the same.
I have to agree. My efficiency has been pretty darn high withpb/pm biab I've been doing. This robust porter should be darn good with that kind of efficiency. Not to mention holding my mash temp better.