Will you tell me about your experience with solar heated pools?

How warm is the pool, and by what time of day, if the average temp outside is in the seventies during the day and as cold as the fifties at night? Does the pool water actually get warmer than the outside temperatures?

Any information you can share about your experience with solar heated pools I am interested in. If you are glad you got solar, if you have had problems with it, and if you would buy it again in lieu of gas or electric heat.