I have a Frigidaire gallery sreries front loading washer with the dryer above in a closet on the 2nd floor. It does vibrate during the spin cycle, and we've not been able to eliminate it with leveling it, which we were told would take care of it. I have found that I need to kneel on the floor and nearly crawl inside to reach that last sock that always gets stuck in the back. According to the people at Tide's 800 phone number, You MUST use HE
detergents and dilute the softener in WARM water before putting it in the dispenser. You cannot always add anything to the load once you've started the cycle (duh!) which can be a pain if you dropped something behind you on the way. You cannot shorten the cycle if you are in a hurry. Once the spin cycle starts, you have to wait 'til it decides the door can open to get at the clothes. You can't soak anything in the machine because it won't fill past the window in the door. Does it use less water? Yes. Do the clothes come out less damp, thus shortening drying time? Yes. Are the clothes cleaner? The lightly soiled stuff gets clean, the really bad stuff is no better or worse than a top loader. While you pay more for the machine, you'll save some in lower water bills. Check the number of loads per bottle of HE vs regular detergent. Using regular detergent results in over-foaming, which can shorten the life expectancy of the unit.
good luck!