Bosch's 500 Series nails the two things that matter most: it's whisper-quiet and cleans without fuss. Owners running two loads a day report eight-plus years of reliable service, which is rare in an era when Whirlpool and KitchenAid pumps fail at year three. Plastics stay damp unless you crack the door or use the auto-air feature, and the racks feel cheaper than the price suggests; a few pumps have died just past warranty, requiring $300-400 fixes, though it's not epidemic. If you value silence and solid cleaning over bone-dry dishes, this is the sweet spot; if you need everything dry or want racks that feel premium, spend more for the 800 or look at Miele.
This is the dishwasher you buy once and never replace, the kitchen appliance equivalent of a mechanical watch that gets passed down. It cleans baked-on casserole without pre-rinsing, runs quieter than your refrigerator, and the AutoOpen drying leaves glassware spotless. You'll pay two to three times what a Bosch costs, and if you live outside a major metro, finding a technician when the circulation pump eventually fails means long waits and expensive parts. Buy it if you're staying put for 15 years and have local service access, or if you simply want the best and can budget for the repair reality. Otherwise, Bosch delivers most of the magic at half the cost.