If you're using moissanite to "pass" as a diamond, I would tentatively recommend against it, or recommend that you practice some caution. I own some moissanite jewelry, and it does have a yellowish hue and sparkles like CZ. It looks like a bad quality diamond under most lights, and looks very "rainbowey" under certain other lights. I love it, and it's a great stone, but I love it for reasons other than it being a "diamond substitute"
