Fantastic flat in an excellent central location. You can walk to all the big sights plus there are metro stations and bus stops very close by.
Being a central location, we did find it a bit noisy when trying to sleep (we had an early morning flight). The flat is opposite a club, but if you're up for going out late that won't be an issue.
Eduard was a great host who we actually bumped into upon arrival. It's clear he's thought a lot about what you might need including the option to purchase some wine in case you fancy a drink, which was a nice touch.