As for location, five stars. It is really in the center and close to a lot of things. As for comfort, two stars. The flat does not have A/C and it gets quite hot at night. And as it is in the center there is a lot of ambient noise. So you are left with the choice of having the windows open with the noise or having a too warm apartment.
Also, the second bedroom is interior, so the window option is not there. That is not apparent in the description.
We also found it quite expensive, given the lack of comfort.
If your priority is location and only that, this could be a good option.
Otherwise stay away.