From what I read, this is
From what I read, this is basically a high voltage DC trickle charger that tops off your battery over a few hours. When a cell gets full, it starts converting the extra charge to heat (very little though, as it's a trickle charger) and this allows the other cells to catch up and fully charge.
Then you can use one of their dischargers or do it manually with some 100w household (incandescent) light bulbs down to a certain voltage, but you must watch carefully not to overdischarge and risk reversing a cell.
Once discharged, you charge it again (takes many hours) with their charger.
They recommend you do this 3 times over a weekend, stopping at a lower voltage each discharge.
From one person thst used it, I read that this restored 20% of the lost capacity, which I see as rejuvenating the battery by 1-2 years or 20-30k miles.
It totally makes sense thst this approach would work, but a high voltage low current trickle charges with no charge-end sensing circuitry does not have to cost $700.
Jist my 2 cents.