The hotel is located very close to Larissa Railway and Metro Station. Abt 45mins - 1hr journey from the Airport. Cost was at 18 Euros from Airport to Larissa Metro Station. Take the exit leading to Diligainni, and you will see Ariston Hotel on the right.
Hotel location was in the middle of Athens. the Metro station was an easy access, but do keep your valuables close to you.
Less than 5mins walk, and the staff and kitchen crew, Marlina was very friendly and will assist you anything you need. From providing boiling water, to showing how to use the balcony door. It was a good stay for me and my best friend. Only thing we hoped to have was a kettle to boil water.
All in all it was a good stay for our 7 nights.

Our room faced a main road and railway and there is a noise problem. It was clean and well-serviced despite maintenance glitches. The staff was helpful especially the receptionist Matina. Breakfast was basic and the same every day. Hotel location near Metro(Larissa station), railway and bus lines makes access easy including to airport (by Metro -change at Syntagma station)

I booked Ariston for my travel in October 2016, I should be flying to Athens and stay with them on 10/9 but on 10/8 my flight carrier informed me the flight would be cancelled due to Greek Strike that the Greece government announced which would last 4 days. Due to being informed I wasn't able to fly to Greece at all, I changed my whole trip itinerary and skip Greece completely.
I was able to cancel all my hotel bookings in Greece except for Ariston. My hotel booking site customer service contacted Ariston several times expressing my change of plan wasn't my will but due to the country's strike issue (which eventually last 20+ hours instead of 4 days, but it's enough time to make a traveler change his/her plan!), Ariston was being very inflexible and inconsiderate replying the strike was over and rejected my cancellation request (My other Greek hotels agreed my cancellation even when I booked their non-refundable plans.)
I have no comments on the hardware and service this hotel provides as I've never physically been there due to last minute change of plan unwillingly, but I wouldn't recommend this property to other travelers in case of any unplanned change of plans.