I'm in the same boat as Spike. I played about 15 hours of vanilla Skyrim, tried to move into a STEP-ped world, and wasn't confident I did it right. I'm currently re-building my rig [re-installing the OS/moving Skyrim to a separate SSD from the OS] and will re-visit the mod.
From the short time I played...Skyrim is the best RPG I've been involved with. If you take the open-world aspect of TES and really run with it...magnificent!