I love this trackball. I wasn't sure if I would...I was a user of the old mouse plug & then the USB model of the red ball model way back in the mid & late 90's before they had a scroll wheel....it just had 3 buttons. This one is great but I still find myself looking for 3 buttons from time to time...but really love how I can use it on my Idea Pad y510p which has a horrible touch pad (although everything else about the laptop is great!). It makes surfing the web or doing work on the sofa much easier since I can rest the trackball on the arm of the sofa. 

Question: How is day?
Answer: I love this trackball