Zorin is definitely one of the easiest Linux distros to use, IMHO. Most of the things ship pre-installed and pre-tweaked to make life easy for a new Linux convert. Further, it looks quite similar to Windows 7 and it really helps.
Zorin has a commercial and a non-commercial line of release. For this review, I downloaded the free Zorin OS 8 Core 64-bit ISO (about 1.6 GB in size). It's final version was released on 27th Jan 2014 and is based on Ubuntu Saucy Salamander with support till July 2014. Zorin 8 ships with a tweaked GNOME 3.8.2 desktop and Linux kernel 3.11.0.
I used Unetbootin to create a live USB on a 4 GB USB drive. I booted it up on my Asus K55VM laptop (2.3 Ghz Core i7 Processor, 8 GB DDR3 RAM and 2 GB NVIDIA GeForce 630M graphic card) and then installed it on a 50 GB partition.
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