My measured OG for this brew was 1.049 which gave me an efficiency of 71.3%. I'm happy with that, especially since I'm still tweaking the system.
All in all I am happy with this system and I feel that I get a good efficient brew day with a minimum of equipment. I can brew both 5 and 10 gallon batches on this system and I don't think I'm losing too much efficiency by not sparing into a separate vessel.
Although I am not using the HERMS coil to regulate the temperature of the wort, it is available in case I want to do step mashes, say for example I wanted to do a protein rest on a wheat beer.
As the system progresses, I'll post more.