My husband and I spent a week at Villa Xenia in July 2017. It is a fabulous villa- it's very comfortable, clean, well maintained and well equipped. The pool is a great size and is ideal for the villa. The garden and sun loungers make it a great place to relax and sunbathe. The sun started at 8.30am and was in the garden until gone 8pm at night. There is ample shaded parking which is helpful in this climate. The villa has the most helpful guide booklet we have ever been given in a rental property and this has been much more help than the guidebook we bought with us. The staff came in half way through the stay and changed towels etc and the pool was regularly maintained.
The only issues we encountered were that the kettle needs de-calcifying- which is easily sorted- and just a few times there were some local dogs barking quite loudly.
Some reviewers have commented that there is a lack of privacy but we didn't feel overlooked at all and it seemed completely private to us.
I would highly recommend this villa and also Kefalonia- what a fantastic island - can't wait to come back.