Back when I tried running my system like a BrewEasy (or any other BIAB system), I was getting around 80%. The big things, I think, is the recirculation of the whole thing. With the stuff just sitting there and no agitation, the efficiency drops notably. I have considered "investing" in the doo-dads I need to run my system recirculating. But, that is just more stuff to clean and to leak and to <blah blah blah>. Eventually I'll cave and do it.
For me, a consistent efficiency is more important than a higher efficiency. I can certainly see the value of high efficiency to a commercial brewer, no question. I can also see the value of indulging an attraction to shiny brew-dads, and adding more "advanced" equipment/techniques (forgive me, Denny). So my consistent 70% might cost a couple of bucks in additional base malt to get to the same OG as compared to, say, 80%, but I'm happy with my equipment and process.
That having been said, a consistent high efficiency is pretty cool, too.