I'm well aware of all the learning on John's site and here, there and everywhere....that's why I asked the question really! I'm not debating the cost, I'm wondering about the actual effectiveness of an Auralex type solution. Clearly, if money is no object, a few minutes sticking foam corners in a studio is a lot less pain than building panel traps, side diffisors/absorbers etc. People like Auralex make big claims for performance and the ProRec review is pretty unequivocal in its praise. So the question is: is an Auralex type treatment as effective as the above? (even if it costs a lot more.)