Karryn's place is a perfect location to HQ yourself while in Mykonos. Recently her apartment was renovated and is perfectly decorated to relax you for your Greek holiday. Be advised there is no giant screen TV but hey...did you really travel to one of the most beautiful places on earth to sit and watch TV (it was actually nice to see that there are very few TVs blaring stuff at you in Mykonos).
Karryn was also a gem with working with me to move my original travel date and was always quick to respond to questions etc. Her assistant/coordinator Aurela was also quick to respond when we had questions or specific concerns (e.g. towels, bed lines). She is also well connected locally so pretty much any recommendation you may need she's going to get you pointed in the right direction. My boyfriend and I were on a hunt for something specific and special to take back to our apartment in Medellin and she knew exactly who, what, and where.
This apartment is perfectly situated to explore Mykonos town and you can easily walk to any part of the old city. The apartment and entire complex is SUPER quiet at night as well as in the day. If you stay further into the old town, your room/apt is going to be smaller and I can guarantee your there will be more noise at night since Mykonos comes to life after midnight.
As an aside, the Greek economy (and Mykonos) is doing much better and now is the time to visit to both keep the economy stable and to enjoy some of the most friendly and hospitable people on earth!