I use MixCube as a mono monitor. It has been setup as a middle-mono speaker, between my Dynaudio BM6. Both speakers go through IK Multimedia ARC2. MixCube looks great. Build quality is amazing. I'm still getting used to mixing in mono. The speakers sound as they supposed to, middrangy, with most of bass energy around 100-200Hz which is good for setting bass levels for media such as iPods, TV, laptops etc. They are really helpful for setting levels. I start the mix with MixCube, set mix levels, and then regarding levels I add compression and basic eq. Then I switch to main monitors for additional adjustments. At the end I check balance on MixCube again and mono compatibility. For me MixCube is essential tool for better mixes.