Stayed in Hotel Nefeli for 2 nights with husband and kid. It is located about 10 mins walking distance from Syntagma Square(which is the main area connecting all the sites). People at the reception were kind and helpful. The rooms were clean and air conditioned. Its a value for money budget hotel , not the posh kind. The locality is safe in the nights and there are many restaurants and super markets nearby. The breakfast is something they need to improve.

I can't imagine why you would want to stay in any other place during your stay in Athens. As a visitor in Athens you want to see all the historical sights, enjoy a great traditional meal, and have perfect peace and quiet. The management is extremely friendly and the room service is transparent and perfect. Finally the prices are incredibly reasonable no matter what service you expect.

Over forty years of staying at various places in Greater Athens, the Nefeli is, by far, the best buy.

Couldn't be better located (a ten to fifteen minute walk to most of the important sites, from the Acropolis to Sindagma to Monastiraki to the New Acropolis Museum); the staff is helpful,. the heating and air conditioning work well and on and on.

This is definitely a budget hotel. Nearly a hostel. Great location and price, but you do get what you pay for.
We spent 1 night in athens and only a few hours in the actually hotel. The rooms are dated and run down. Our room smelled of smoke and the bathroom although looked like it was just cleaned , wasn't somewhere I would shower without my slippers.
The staff was very nice, we missed breakfast on check in and check out so I can't comment on that.
When trying to find the hotel, do not used the map on their website, it's not really adequate.... google map it.

The location was ideal and made it easy to see all the sights in a day.

I only recommend this hotel for a short stay but if your planning spend some time in athens then maybe look elswhere