If you are comfortable with a fixed range of shapes, and smaller sizes than what you can get with plaster (look carefully at the dimensions in the catalog; ours has a maximum depth of about 5′), the speed of installation is a huge benefit.
But think really carefully before doing it. The $40K installation cost is one thing; the maintenance cost is another. Think $250 a month for electricity, water, chemicals, labor.
And the time period in which the kids really get a lot out of it is narrow. Maybe five years, from 7 to 12.
