The iMac I have is the 21.5 Core i3, 2010 version of this product. I have come to LOVE this machine. The smooth-ness even with the older, less powerful i3 processor (clocked at 3.06, single core) is unbelievable. Since then, I have not a any issues. The Magic Mouse takes a while to get used to but I also have grown to love that little thing. The keyboard is also great, Since my original purchase of this product, I have upgraded it to Mac OS X Lion. No flaws with that either. I recommend this computer to anyone looking for an amazing, flawless product that, well... works perfectly! In all it is a well polished computer that has amazing features and an all around great design. 10/10