There seems to be some confusion about the benefits of the Realiser. I'm not sure if the confusion is among those who have never used it. In any case, I thought I would say how and why I find it an incredible product.
We moved from a large house to a small one. Instead of a spacious listening room I have a 10 by 10 by 8 bedroom in which I can have my music setup. I tried many room treatments to improve the listening experience, including even having a top of the line room tuner who works with AIX, etc. work on my room. Improvements were very modest. When I heard about the Realiser I thought that this might be a solution for me. I can obtain measurements in a fine professional level listening room with top-of-the-line equipment, and then, so to speak, emulate this room in my tiny room via the Realiser and Stax headset. This is exactly how I use the Realiser, not for movies, but for music. I listen to both 2-channel and 5.1 music via this setup.
Why do I use a Realiser for 2-channel? Simply because I am able to recreate the experience of listening to music in a perfectly balanced listening room over very high performance gear for the modest price of a little over $3000. Currently I don't even use an amplifier, but simply connect the Realiser to to the inputs of my Oppo transport. Yes, 5.1 adds a whole different level. I do love the surround experience. However, more important is the quality of the original recording. Many stereo or SACD discs provide excellent experiences. In fact, my own opinion is that while super high resolution is terrific, ultimately it's the quality of the master that counts. I have some redbook stereo discs that compare very favorably in terms of spatialization and sound stage to some lesser surround discs. There is a small selection of blueray, or DVD-A, or other multi-channel discs which have both, the superior source plus the surround experience and resolution. Of course, these are wonderful. But for any of my recordings, the experience of listening by way of the Realiser far surpasses anything I could achieve in this room by means of room tweaking or otherwise.
I should add that I have had the good fortune of being able to obtain PRIRs (personal calibrations) in some top-of-the-line listening rooms over gear costing many tens of thousands of dollars. This is not always easy to achieve, and is a definite limitation of the Realiser. It takes patience, perseverance, and some luck to find those willing to allow you to do these measurements in their shops or studios. Without this, the Realiser would be of little use to me.