In my opinion, any acoustic company worth their salt should have their treatment tested by an acoustical lab so we can see some hard absorptive data. Without that, you have no clue what you're getting. I wouldn't bother using foam-based products, in my opinion.
Foam products are decent at absorbing mid-to-high frequencies but mediocre at best when it comes to lower bass absorption because they generally have very poor gas flow properties. Since foam tends to absorbs higher frequencies, or rather, absorbs reflections at higher frequencies, this can result in a room that sounds like the treble controls have been turned down while leaving too much mid-bass and lower bass. In other words, all the boom remains while the highs are tamed. This is what happens when too much foam is used in a room.
To be fair, fiberglass can result in a similar outcome if too much is used. The difference being that fiberglass is considerably more absorptive at lower frequencies so you'll end up with a more balanced result.
