Around here i would say Miele is considered the best and high-end, Bosch/Siemens are premium brands, Whirlpool and Electrolux are the ubiquitous mid-range brands you find everywhere, LG/Samsung/Haier are considered low-end (for home appliances, I am not talking about electronics!) and mainly compete on price, so maybe we don’t get the best part of their product range.
I have had both Bosch and Whirlpool appliances, and when you use them you do feel that Bosch is better engineered. The ovens are more silent, the racks in the dishwashers hold the dishes better, the washers are more efficient at spinning, details like that. The Whirlpools i had were very good, but Bosch is better.
Whirlpool EU is engineered and made in Italy (or France for their dryers). Their appliances are not the fanciest but I think they are reliable. It’s what Ikea sells around here, with a free 5-year guarantee and I don’t think they would do so if the products were not reliable (given the prices of most of their appliances, a service call would eat any profit).
All-in-all I think that Miele is the best but you definitely pay a huge premium, Bosch is better, and Whirlpool EU and Electrolux EU have a very good quality/price ratio.
The 2-year legal guarantee covers any problem that would impede the appliance to perform as expected, within 2 years after purchase. The manufacturer must repair, replace or refund the appliance.