We camped here for 2 nights in early September. The staff were extremely helpful, on check in we were given a pamphlet about the bus and train and she highlighted what we needed to know. She then gave us a map highlighting where the campsite is, train station and route the bus would take us to the train. She then went through the main attractions writing down opening times and told us the public transport tickets available! The location is great! There is a bus across the road that takes you to the main train station and your in Athens within minutes from there!
The bathroom facilities are plentiful and clean and there are many pitches under shade. The ground however was very hard and we were only able to get 8 of the 13 pegs into the ground for our tent. We saw many other tents in the same situation. The mini market is small but has the basics. There is a massive AB supermarket 500m from the campground (turn right from the entrance and follow along) however so you can get supplies. We didn't try the onsite restaurant as we are vegetarian and there looked to be little on offer for us, plus the prices weren't great.
The wifi only worked near the restaurant and market bit there were plenty of seats and tables and electrical points to charge there. They had the odd habit of hosing down the pavement in the restaurant area in the afternoon even if people were sitting there and they would literally flood the area with water so your feet would get soaked and it was awfully slippery. Also they charge €6 to use the washing machine, €4 for the dryer and €1 for powder! The dryer and powder I think is reasonable but €6 to wash clothes is the most I've paid anywhere in Europe!
The main thing to note however is the noise. It's on a very major road and the traffic noise is relentless. I come from a big city and im usually fairly easy going with respect to road noise but
I simply couldn't sleep well here. This is the first place on our travels where I've had to use my ear plugs.
Overall however it is a good campsite in a great location.