Apple Powerbook 15" and 17"
I have recently been looking at an apple powerbook, and I noticed something quite strange. All powerbooks come with a slot load CD (this is not the strange part, slot load is very cool). the 12" has the slot on the side, so that's great, if you want to load your favourite music cd, just slide it in on the side. However the 15" and 17" have their slot load cd player on the front. So if you have your laptop on your lap (like the name suggests) then putting a CD in can be quite tricky, you would have to slide the 15"/17" powerbook forward and then slot your CD, not very practical if you are in a seat where you are restricted by space.