JennAir built-ins once rivaled Sub-Zero in build quality, but the brand you're buying today is a Whirlpool shell wearing a luxury badge. Multiple freezer failures within three years, units declared non-repairable under warranty, and replacement waits of three to four weeks while your groceries spoil in a borrowed mini-fridge. Wire racks corrode and collapse, and the warranty process involves hour-long holds and disconnected calls. At this price point, buy Sub-Zero if you can afford it, or save half and get a GE Profile that will likely outlast this.
Thermador sells you a Bosch 800 with upgraded handles and a luxury badge at double the price, banking on the pro aesthetic and dual-compressor engineering. The problem is concrete and expensive: evaporator fans and compressors fail on units just past their two-year warranty, leaving the fridge compartment at 50°F while repair quotes run $475 to $4000, and Consumer Reports ranks Thermador below mid-range brands for reliability. Buy this only if you need the built-in look for a high-end kitchen remodel and can budget for specialist service calls, or if you find a steep open-box discount that cushions the risk. Everyone chasing appliance longevity should walk.