We've had both. Combo takes to long. When drying, 120 volts take longer than your 220 at home but still vented dryer works pretty good. With stackable it's nice to be able to wash and dry at the same time. If you have room then the stackable is much better though nothing compares with residential style washers and dryers. I've seen to many rv laundry mats that are filthy.
|