In terms of location, unbeatable. A 5 minute walk to the Metro ‘Opera’ stop, and a stroll to the Palacio Real.
Highlights for local bars are ‘Refra’ (Calle de Santiago, 4), and Bar La Esquinita- neither for Michelin stars, but for a real Madrileño experience.
Flat was nice without being over the top. Only hindrance was the slight smell, unpleasant but not overpowering. Bed is very comfy, and a unique and modern layout.
Security was great, with two deadlocks to enter the flat.
Recommended, for the traveller looking for location over function.