The location is phenomenal. Between the Opera metro stop (2 min walk) and the mercado de san migeul (4 minute walk) and the Royal Palace (4 min walk) and next door to an awesome patisserie (0 min walk). Can't say enough about it. There is a Michelin star restaurant around the corner if you're into that. If you want cheap food, it's around too. And there is a really cool blues bar - La Croquette - about 5 min away that was fun.
TL;DR: Perfect location for first time visitors and also for foodies. Excellent for all else.
The host is wonderful: He made check in SO easy and even came to our rescue when we had trouble with the (Euro) washing machine.
The bed is the best I've had so far on my current European trip (5+ different lodging). The top floor view is delightful out several windows. The apartment is under the roof, so you will cruch while walking in the loft space (where the bed is). The main floor has a normal ceiling.