I've had my A350 over my nano cube for several months now. I'm getting decent growth on my SPS and pretty good color on everything except my GARF purple bonzai and Palmers Blue milli which are both dull in color. However, I had increased both channels to 100% with the light only 5 inches or so over the top of the water. I dialed down both channels to 75% to see if I get any response from the dull SPS or maybe some increase in zoa reproduction.
Overall I'm happy with the light and I may stick with it when I switch to my Solana Superbrite just because of the clean look of it on a rimless and the nice shimmer. If there's anything I'm not crazy about it would be the one single light source. It does cause some shady areas and parts of coral that lack color due to shading on one side. I can say though that these lights can grow out SPS with good color for sure.