Very nice appartment, located near Larissa which is a good metro station to reach pretty much anything.
Stellos is very reactive and answer messages within seconds!
For the downsides, I would say that the appartment was not so clean, the bathroom trash was not empty when we arrived (which is a bit disgusting as it was half full of toilet paper 😶), we had a brown hair on the bed (ca'nt be ours..). There is also a sign saying that we must take out our trashes ourselves, which I found weird since we pay 20+€ for the cleaning 😊
But, to be fair, for the price, I would definitely go there again if I had to return in Athen! And Stellos is a very convenient and easy to reach host.