We have just got back from a week's holiday in Svoronata and it was exactly what we were looking for.
Very peaceful and relaxing.
Perfect if you want to get away from it all. Halfway through the week, we commented how lovely it was not to have heard any sirens or seen a single police car!! Don't think there are any speeding laws, etc in the rural Greek islands!
The weather was perfect - we only had one day that was a bit cloudy but we used that to explore. It does get rather chilly at night though and I would recommend you take a light coat with you when you go out.
The only drawback is that places are quite spread out and therefore a fair amount of walking is needed - not so good if you are lazy like me!! It is therefore best to either hire a car or, if you are just going a short distance, get a taxi. The fares are quite reasonable.