I'm a windows user since 1997, my desktop at home is a windows 8 dell xps. I bought my very first rMBP a month ago. It wasn't because I like OSX better, simply because there wasn't a new PC laptop that meets my hardware requirement and doesn't come with a major flaw at the same time, well the new ASUS UX301LA does, but it cost 2200 dollars and wasn't available back then.
I bought the std i5 8G 512 configuration for 1799, I'm very satisfied with the hardware and the performance, and the touchpad, the gestures, the smooth user experiences are all great, however, on the other hand, I am not as satisfied with the OS and the software that available to this ecosystem, since I run windows 8 on parallels, it's not a big problem.
1. Finder is not nearly as good as windows explorer on win8/8.1
2. Office for mac is only useful for basic tasks, and it is not seldom to see a 2 pages doc turn into a 3 pages document on office 2013 with a line or two on the third page.
3. There is no photo manager nearly as good as ACDSee Pro on windows, the expensive ACDSee for mac is a joke... Xee is good for viewing only, not managing. iPhoto is a jail house...
The mail app isn't good especially considering I rely on Gmail, the Airmail is pretty good though, solved my problem.
Some other software that available to both OS performs better on windows, such as Office, QQ, YTD downloader, adobe lightroom, Xunlei downloader, just name a few that I use most often.
I try to stay on OSX as much as I can, but I find myself switching to VM quite often.
the hardware of a rMBP is as good as if not better than any PC laptop out there, but personally I believe windows 8.1 may have a slight edge over OSX 10.9.1.
Don't get me wrong, after reading some reviews/hands on experiences of ASUS UX301LA, ATIV Book 9 Plus and Yoga 2 Pro in the past month (my original wish list before turn to Apple). I still think I made the right choice by purchasing this 13 inch retina macbook pro.