I can see the fountains working out as more of a couple attraction. If you're in Vegas with a group and here more for the general debauchery, they are worth a look but you wont really be able to appreciate it. I'll let you guess which category I fell into on this trip.
The playlist is available online from sources, most of the songs are older classical ballads with a few newer slow pop songs (think Celine Dions rockin Titanic anthem), and lets be honest after a long morning, evening, and night of drinking hearing "My Heart Will Go On" is probably going to be lights out.
They truly are spectacular and are a great way to end an evening (they stop around midnight).