Has anyone used Echo Busters?


I'm going to treat my room with ASC or Echo Busters, but the ASC is more expensive. And now I am considering the Echo Busters. Is there anyone that has used the Echo Buster. Please give me your opinions.
ltt142
I forgot to say I put them in the ceiling half the recommended amount and they worked great.
I too was going to use the ASC, but Echo Busters were less money by far. I went with the Echo's and most pleased with the results. One bass trap in each corner, 5 absorption and 2 diffusers, as well as 4 corners. Work very well.
If you feel handy there are instructions for DIY versions of the asc traps, corner busters and room lens on audio asylum. Now that winter has showed up i'll be addressing a set of lenses for my room. too cheap not to try.