I won three of the four lots I had bids in on. My max bids were set for a couple of weeks, with a couple of bumps made in the mean time and not a single bid placed yesterday. I have four children and am a Church goer so there was no way I could stay up. Turns out the one I lost was bid on at 1:15am Central time. That was the first bid on that lot in the last few days.
In that case a lot by lot situation would have been great. Forget 15 minutes, what about 48hours without a bid.
Oh well as Leon has said before there is no perfect solution, but I do think the lot by lot may be my current favorite. I only have to stay up long enough to watch my interested lots not get anymore bids for 15min.
I am still very happy with the three lots I did get, and won't sweat the one I didn't. Since it took that long for someone to bid I assume it was just a "too good of a deal" bid and it will be flipped soon enough and I will just try to pick it up then.