As a destination for a holiday Cambodias highlights are its historic sites and the people - especially the people, take the time to interact with them and they will love it. The beaches are lovely and offer that mixture of warm water and soft sand while having activities, food, drink and entertainment all on hand.
Taken in its stride Cambodia will help you walk a little slower, relax a little more and not test your patience too much and you should leave with great memories of a country that really has its feet in two different worlds, Cambodia can offer you modern amenities (internet, phones, ice cold drinks, comfy quality accommodation, tasty food) at a reasonable price, while treating every visitor with such respect and friendliness comfortably accepting you into their ancient culture where monks roam the streets and temples, shoes are traditionally taken off before you enter buildings, 'normal' life continues around the modern visitor to this anciant country. I hope this blend of old and new lasts for many more years.