We've visited the broader Polis area many times, and have regularly headed to the harbour and beach at Pomos for snorkeling. This was the first time we've actually stayed as far along as Pomos itself though, and it turned out to be a perfect location for us.
The Villa is absolutely lovely. It's a modern build, and under its traditional looking exterior is actually a super insulated timber framed house. This means it feels slick and modern with lovely oak kitchen and staircase, and clean and bright bedrooms and bathrooms, whilst also giving you all the traditional Villa feel with outside living on the veranda and a superb pool. The Villa was faultless during our stay, but Jim and Lorna who look after the property are just along the coast and come in to maintain the pool regularly too. Overall it provided perfect zero hassle accommodation for our party of four, and great value too.
The standout this year was the proximity of the Pomos beaches. Most days my youngest son and I would take a quick walk to go snorkeling. It's an easy 10 minutes walk up to the harbour and the rocky headland there. Alternatively it's even easier to turn the other way from the Villa and walk but 5 minutes down the signposted path to the beach at Dragon's Cave. Simply walk down with snorkel and beach shoes, enjoy the clear and interesting seas, and then walk home again drying in the sun! Perfect and zero effort! We've never snorkeled so much on a holiday!
The above said, as other reviews mention you definitely do need a car for other activities. Compared with e.g. staying in Argaka, popping to the supermarket at Polis is suddenly much more of trek, but the couple of mini-marts in Pomos itself are fine for most daily needs.
Highly recommended overall!