personally, they prove very useful in spotting hi-mid harshness, as my main set of monitors (klein hummel/neumann o300) can be a little forgiving in that freq. region. and the vocal / VO levelling, as has been mentioned. you could probably get the same features from a cheaper box, it’s just these are a standard, you know… speaking of the behritones-- i’d considered those for a second but it was the SoS (quite unflattering) review that made me change my mind (and SoS are usually very diplomatic with their reviewing).