My wife and I stayed at Hotel KVL for 2 nights having chosen it due to its location - waterfront, and walking distance to the National Museum and Royal Palace which we wanted to see in our 1 day in Phnom Penh.
I recommend getting the hotel to arrange airport transfers - takes the hassle out of getting to and from the airport.
The rooftop bar overlooking Tonle Sap river is fabulous and the signature cocktails delicious.
Plenty of different food options and friendly staff. Special shout out to General Manger Carl Sladen, who made the effort to introduce himself at lunch, and finding out we were Aussies and about to spend the next 9 nights in Siem Reap, surprised us at checkout with a gift - a jar of Vegemite!
Many thanks Carl and team, we very much enjoyed our brief stay at Hotel KVL and highly recommend it to all visiting Phnom Penh.