I don't have one but have seen it in person (M4). It is a much more complex and rich color in person.
I don't think I could pull the trigger on it, but can't fault anyone for picking it. Just be prepared for attention wherever you go. Not necessarily from cops but other motorists. I can't imagine the endless conversations at the gas station.
If you don't mind or like the attention then I say go for it.
PS- I too laughed at the color when I first saw it. Even Roundel called it "Urinetown". I now have to admit its really not bad. Now YMB, I'm still not sold.
UPDATE
PS Part II- I've gone and done it. I actually ordered AY for my M3. Unbelievable comeback for AY. I went from laughing at the color to picking it.
Obviously those in charge of paint know what I like more than me.