I had remember reading about Apple switching the SSD in the Fusion drive to 24GB for the new 27" iMac 5K 1 TB. Well at least I remembered after I bought it and was cussing at it for being so slow. I was spoiled by my MacBook Pro Retina with a 256GB SSD, but was really surprised at how slow the 24GB Fusion really is. I only had 130 GB on the machine - but over half of that was apps. Microsoft Word and Excel were brutal to start (Word was usually 10+ seconds). Once I realized the Fusion issue, I saw that Best Buy was clearing out the late 2014 model for $350 off. Bought that instead with its 128 GB Fusion SSD and it made a huge difference. The i5 in the old machine is slightly faster, so the machine is a decent deal. I also like the old keyboard better. Anyway, really lousy of Apple to make this change. I really can't recommend the 24GB Fusion since most of the space goes to the OS. The late 2014 machines are a decent deal while they are still out there.