We had a fantastic stay in Villa Iason. We were a party of 6, so we rented the smaller 3 bedroom villa, which had everything we needed. The pool was a huge added value, especially if you travel with kids, because it gives you the option of just hanging around the house rather than having to roam from beach to beach constantly, which by the way can be quite tiresome in August! Another added value was the excellent air conditioning, which is set up in every room and in the huge open space living room / dining room / kitchen set up on the ground floor. The villa is part of a 4-villa area, therefore there is staff present (thanks for everything Katarina!) from Monday to Saturday for most of the day; you can talk to them for whatever you might need.
Finally, another great asset of Villa Iason is its "strategic" position: if you're interested in visiting the main beaches and towns in Western Crete, this is a great place to use as home base. The small town of Maleme is very nice and not as busy and touristy as Platanias, which is 4 km away, which for me is a big plus. You can easily reach Falassarna, Balos Beach (the boats to Balos depart from Kissamos, which is 20 km from Maleme) and Elafonissi, which are the most beautiful beaches in the area. Chania, the main town of Western Crete, which is well worth a visit, is only 15 km away.
Personally, I can't wait to go back...