I've been using CARA for a couple of months. It works wonderfully and I highly recommend it. I've been able to confirm the results with my Tact RCS.
The only major flaw is that it would take an unrealistically long time (several years) to do an accurate set of calculations for all but an empty rectangular room.
One interesting thing that I've found is that in a model system, I do not end up with anything close to the Cardas placement of speakers even in a room with Cardas' recommended dimensions. This isn't too concerning because my room is no where near perfect.
I noticed an immediate improvement in soundstage and tonal balance when I put my speakers in the weird assymetric places that CARA recommended.
The only major flaw is that it would take an unrealistically long time (several years) to do an accurate set of calculations for all but an empty rectangular room.
One interesting thing that I've found is that in a model system, I do not end up with anything close to the Cardas placement of speakers even in a room with Cardas' recommended dimensions. This isn't too concerning because my room is no where near perfect.
I noticed an immediate improvement in soundstage and tonal balance when I put my speakers in the weird assymetric places that CARA recommended.