Markertek as good as Auralex and Primeacoustic?

Hello, Im looking to add sound treatmeant to my room. Some bass traps and diffusors, etc... I was reading the latest issue of EQ and saw an ad for remarkably cheap products like the Auralex or Primeacoustic stuff. This is there website: http://www.markertek.com/CatList.asp?ca ... ch=0&off=0 Is this stuff ok? Looking for advice! Thanks very much!

It has the same acoustic characteristics and (important!) fire ratings. The dimensional tolerances are lousy. Andre