They solve all LED dimming issues, and dimmers are much cheaper because you can use the 4 channels of PWM RGBW dimmers independantly, with multiple spots on each channel
Also opened them up, switched lenses. I took some pictures and put them on the product pages on our webshop.
Now I'm testing all the Loxone PWM dimmers, KNX PWM dimmers and other, and I'll write up a review on the product pages.
In short, I think they are great. The WW version has a lens that makes it look like a regular halogen spot. Also the 3000K color temperature is correct at full intensity. When dimming to very low values, the color of course stays at 3000K while an old halogen turns more red.