I have the Whirlpool Cabrio, which is the whirlpool version of the Oasis, and have to say that it works very well. Its not rough on the clothes at all. The "Invisible" agitator doesn't have any large fins so nothing can snag.
The recirculation works on all the cycles, only once every few minutes. It only recirulates because there is a lint filter over the hole that the recirc pump uses. and it recircs to clear the lint out. The recirc pump is also used for the "Catalyst cleaning." It is also used to weigh the load as well. When the machine is first started, it fills through the detergent dispenser for a minute or so, showers the clothes to get them wet. The machine then spins and the load on the motor as is spins give the computer a clue to how much the wet clothes weigh. It does this 3 times in all the cycles except Sheets/Towels to get right amount of water everytime.
The machine only uses the proper amount of water for the load because it weighs the clothes and determines the amount of water. Only the Clean Washer cycle and Sheet/Towels uses more water then normal.