they're cool, but have weird problems, the one in mojave, had issues with literally vaporizing birds, which might be worse than traditional wind turbines. Considering you can see them.

The mirrors are incredibly susceptible to dust and debris, being in a desert doesn't help all that much, so they have to be regularly cleaned. The actual mechanism of heat conversion works, but you can just do the same thing with electric resistive heat and solar, or wind, as heat storage so meh. Though it probably doesn't work quite as well.