Comfortable mattress, we bought 17cm depth, it's quite firm and provides excellent support during the night. The mattress  depth is equal with the bed frame , but the 20 cm would be too soft for us. As the item was bought with the 50%discount it makes it even more appealing. Dormeo is the best choice, we use the mattresses since 2004 and pleased with the quality and service equally. Definitely recommend it!