PLOVE-
To be honest, I've only been able to squeeze in about 8 batches on it so far, but typically I am in the 4-5hr range . I will usually fill the HLT and start it heating, then get things set up for the brew day.
I have set up a Strike water program, and a mashing program, but for right now I still monitor the dough-in, sparging process, and the boil in manual mode. Eventually I will like to have one program, where I will need to only re-position the valves and okay the system to advance to the next step, but that will be in a while. I built a shed out back at my house, so I can clear out the garage and have it exclusively for a brew space, and I think getting things more organized will speed things up a lot.
Im probably going to reduce my Mash saccrification rest down from 45min to 20min. but that is not that much time off the brewday, but I feel I can get it down into the 3.5-4.5hr brewday range.