We bought a Bosch (Nexxt 500) about 6 or 7 years ago. No mold problems, but I can see where they might be if you didn't wipe the seal between the door and the machine. It has drain holes that go back into the drum, but if some hair, or a forgotten tissue lands there, it could hold water. This machine made the move with us, about 4 years ago. It is one heavy thing! In the first house, it was on a tile over wood floor. It would shake-rattle-and-roll when it went into the final spin cycle. In the new house, it's on a cement slab, and we don't hear a thing. If you decide to get one, invest in the pedestals to raise it up a foot or so - it helps the back. F.Y.I. - Bosch and Siemens are the same company (Dodge/Plymouth/Chrysler; Chevy/GMC; Ford/Mercury). Both are/where made in North Carolina.