Pros: Money goes to a great cause and are not limited edition
Cons: I don't like the color of VIVA GLAM II and VIVA GLAM NICKI color might look different on diverse ladies
I only own 2 of the MAC VIVA GLAM collection and my lippies are MAC VIVA GLAM II a satin formula that looks brown on me and doesn't suits me very well (maybe I'm not a Brown lipstick fan), the formula is comfortable to wear but doesn't last that much.
The other I own is VIVA GLAM NICKI is also satin formula is described as "yellowish pink" and it's true the color is rich & easy to apply and the formula last for about 4 hours on me. I bought it thinking that would look coral pink on me as it does looks on other ladies, but looks bright barbie pink on me :) (I'm currently NC35 as it's summer :)
Update: I now also have MAC VIVA GLAM I it has a MATTE finish and the color is a true retro red and looks great on any skin tone. I love it, but don't use too often as I don't feel too comfortable wearing reds and browns. My heart is with corals/oranges/dark pinks for everyday use.