General overview: great house; the description and photos are accurate. Perfect for a relaxed beach holiday.
Location: Marathi is a lovely small village with a few beaches to choose from within a few mins walking distance. There are a few beach tavernas too serving food, drinks, cocktails etc. Important to note, there isn't a shop in the village to buy food, the nearest is in (upper) Sternes, about an hour walk away! So do consider hiring a car. There is a bus which runs four times a day between Marathi (bus stop at Loukoulos taverna) and Chania*, and opposite the Chania bus station, there is a good value hire car place.
House: the house has all you need to get by. Barniadakis provides towels, linens, a good iron and hairdryer, some coat hangers and basic toiletries. There is a tv and air conditioning, he even installed wifi for us too! There is an oven, gas hob, breakfast (French toast, fruit, milk, jams, honey) and a BBQ and coal/fire lighters should you wish to use it. The views of the bay from the house are fantastic. It's not noisy or light so you will get a good night's sleep. There are a couple of local dogs (we understand are not strays) and cats which visit the house veranda, but are friendly and go away if you want, so won't be a problem if you don't like them/are allergic. Would recommend bringing citronella candles. Beds consist of two single ones upstairs, and bunk beds downstairs.
Barniadakis: really nice guy and responds to messages really quickly.