Brad G.
Yelp
Location, location, location. Let me say it a little more clearly, THIS HOTEL IS LOCATED IN THE BEST POSSIBLE LOCATION TO SEE MADRID.
It is literally steps away from Puerta del Sol which is the center of the old city. From Hotel Europa you can easily walk to Plaza Major or the Royal Palace. The hop-on / hop-off bus stops 100 yards from their front door.
Like all hotels in Europe the rooms are a little on the small side, but you don't go to Madrid to spend time in your room. Even though the rooms are a little small, they are clean, modern, quiet, and comfortable.
The hotel staff speaks English well, and they are VERY helpful. While this is probably rated as a four star hotel in Europe, it's closer to a nice three star hotel in the USA.
We've stayed here before, and we'll stay here again. We've referred many friends here, and they've all been happy. If Marriott owed it, it would be 400 Euro a night, but at closer to 100 Euro a night it's a bargain.
Here's a tip, eat breakfast at the buffet next door to save a few dollars.