You will not do better than Siz’s flat for an all-around good experience in Amsterdam. Perfectly located for the RAI (ten minute walk) but also walkable to the centre, with lots of shops and restaurants and street life right around the corner. Spacious flat, comfy bed and sofa, well appointed kitchen. Siz is delightful and went that extra mile with little touches like stocking the fridge with a few complimentary items and leaving a bowl of fruit on the table. Do note the 6pm check-in time, though there are plenty of spots in the neighborhood where you can hang out if you arrive early.