Who has a 3D mouse

If you have one, what kind is it? How long have you had it? What do you like/dislike about it? Would you recommend it? Was it worth it?

If you dont have a 3D mouse, why? Are you planning on getting one? What is keeping you from getting one? Price? Wont use it enough? Dont do 3D? What is your opinion about them? Have you ever tried one? Do you want to?