We stayed here for a week and were very pleased with our choice, both of Elena and Stani's house, and Conca dei Marini. Elena, Stani and their friend, Antonella, couldn't have been more helpful or considerate. Elena helped me with our travel arrangements from Naples (train to Salerno, then ferry to Amalfi) where we were met by their friend Antonella, who got the bus with us to Conca, and checked us in. Antonella was lovely, and helped us several times during the holiday.
Stani visited us soon after our arrival to make sure everything was okay, and to provide us with local information and advice. He also brought us some delicious local cheese, and a basket of fresh figs.
The house was lovely, and was equipped with everything we needed, including air conditioning and WiFi, and the balcony is a lovely place to sit and admire the views of Amalfi and the coast.
Conca itself is a pleasant, relaxing place that provides an excellent base for exploring the Amalfi Coast, but, as others have said, be prepared for the steps.
In conclusion, if you want a quiet, relaxing base to explore the Amalfi Coast, with delightful hosts, I would strongly recommend you stay at Elena and Stani's house.