Yes I do use the H100 (medium) though the H80 isn't much different (1C~4C). The OC is validated stable 24/7 and I have several other BIOS Profiles ranging from Stock to 5GHz. The 4.8GHz @ 1.40v is the most stable 'sweet-spot' of the high OC profiles (vs the 1.36v below). Also, yes all of the energy savings enabled so the CPU throttles down to 1.2GHz and it will sleep/wake as long as I don't leave Chrome open (bug in Chrome/won't sleep); if needed sometimes adding a start-up voltage can fix some OC 'wake' issues. In addition I have OC profiles for the GPUs, some games OC'ing helps and other games there's no point 120FPS vs 150FPS -- ditto with the CPU.
As mentioned, I refuse to run >1.44v vCore knowing LLC adds an additional +0.01v~+0.03v, and I also refuse to use goofy LLC and Phase levels. I have nothing to prove and my SB-E CPU is a good one so I want it in one piece. Also, DDR3L type RAM is easier on the CPU.
You can take pity on those with 1.50v vCore and above on the following list because they're all burning-up their $600~$1000 CPU's -
http://www.overclock.net/t/1167939/sandy-bridge-e-overclock-leaderboard-owners-club
4.8GHz @ 1.36v (SQL stable / hardcore gaming or some benching it can drop out) -
http://valid.canardpc.com/show_oc.php?id=2320509
IF all you're doing is the Web, YouTube, etc i.e. general easy stuff then load a Stock profile -- it takes less than a minute form Restart->Load a BIOS Profile->Back into Windows. It's silly to run e.g. NetFlix @ 4.8GHz not to mention the additional noise/room heat/kWh.