The spatial panning in conjunction with the Room presets (which are good in and of themselves imo) is the interest factor for this one imo.
Did a remix of an acoustic arrangement that used virtual rooms and stereo panning and sounded good. In the remix I used MR on each channel with small room and its spatial panning and its a very nice change providing much more sense of instrument placements in the sound field. More of a 3D effect. Mono compatibility was very good in the original mix but actually improved slightly doing MR for room and spatial panning. Worth a demo if you do acoustic instrument mixes. Haven’t tried on electric mixes yet but suspect it might be good for adding spatial information.
Caveat is $9.99 min purchase, so I bought a preset lib for Vital for $5 with this.