Overall, the size of the tank, quality of the jellyfish and the different lighting and dimming options make this worth the price. I turn it on for going to bed and I love watching them dance. It is on a 4 hour timer so if you're like me and turn it on at night, when you wake up it will be turned off so no need to worry about wasting power and potentially running the motor to poop.
TL;DR: best jellyfish for movement, best tank size for cost, lots of lighting and dimming options, tank is on a timer of 4 hours, and very quiet.