Kusadasi is a great place to enjoy the Aegean coast, and at the same time be close to amazing landmarks such as the Ephesus ancient city (30 min away) and Pamukkale (3h away). It is also 1h away from Izmir airport, which makes it very convenient. It's not great if you want a pure beach holiday, as there are better beaches further south.
Over Charisma Deluxe:
Hotel Charisma Deluxe is a perfect choice for a Kusadasi holiday - it is a true 5 star hotel, with great facilities and staff. The seaside views are absolutely stunning, it is worth to pay extra to ensure a seaside room. It is also one of the few hotels within walking distance of the Kusadasi city centre, with great dining and shopping options there as well.