I use them and find they do a wonderful job but yes they are pricey. I've told dozen of customers to go to Home Depot or Lowes and buy one of those rose trestle (3 or 4 fingers made of cheap wood) and make a wooden base and place one in each corner of the room. All these do is break up sound waves to smooth out your room response, yes the Shakti device looks like a piece of art but for $12 you can have the same benefit.
(Dealer disclaimer)
(Dealer disclaimer)