I have the Supreme Greens with MSM. I have the powder and mix it in with 8 oz. of apple juice. It doesn't taste too bad if mixed with juice.
I haven't taken it for a month or so and I take Dr. Schulze 's Superfood every morning and didn't know if this was "too many greens". Although when comparing both labels, they have little of the same ingredients.
I have never tried Perfect Food but my wife and mother took the Supreme Greens with MSM and commented they felt they had more energy after they drank that.