We just moved into a new house a few months ago and I have been wanting to pick one up based on the recommendations here, so I went down to the music store and got a BFD 1124. I hooked it up and spent a few hours figuring out how it worked and started taking some measurments with it in bypass mode. Now, I have always had some kind of nasty peak in our different apartments, so I figured it would be the same for the room in our house. Much to my suprise from 26-80 Hz there was little variation(within 2.5-3 db) in the 6 square foot space I had to work with. I was up between 4-5 db at 20-25 Hz. These were crude measurments taken with Avia and an SPL meter(with corrections), so I know absolute accuracy was not possible, but at least the shape of the curve could be attained. I really don't know if it is worth having the BFD in the LF audio chain just to tame a small peak between such a small range of frequencies at the lower end of the spectrum. I remember someone(Wayne?)even suggested that it's not really beneficial to flatten down below 25 Hz or so anyways. Moral of the story: Measure before you decide you need to make some changes. DJ Note: For those of you who do have peaks in your room, the BFD is everything that members have been saying about it--it performs very well after you figure out how it works(it's really not that complicated).