We had a nice stay here during our week in Athens. "Luxury Penthouse" is overselling the appartment a bit, but that's not a huge deal.
The main reason you'd want to consider this Airbnb is the stunning view of the Akropolis.
If you like elaborate cooking sessions, bring some of your own pans/tools; we'd describe the available equipment as 'Spartan' 😉, but if you want to eat out a lot in Athens's many restaurants (the host can give you a lot of great suggestions,!) you'll be fine.
We did have some issues with the bed falling apart when we were sleeping though: the boards lay loosely in the bedframe. We notified the host of this on the last day, and were told this would be taken care of. So though this was our experience and the host didn't get a chance to fix it during our stay, we assume this will have improved after we've left.
The neighborhood's not the best, but then again you're not paying for an appartment in the more expensive parts of town. The trains coming past like to use their horns because of the foot crossings, but that didn't bother us too much. The metro station is nice and close by.
All in all the appartment is a perfectly good place to stay for the not too expensive price. If you're looking for something with a nice view of the Akropolis: you've found it.