Obligatory comparison with non-Apple laptop
Pcspecialist in the UK have a 13.3" Lafite laptop. Playing with the configuration gives
1920x1080 screen
i5 5200U
8GB in a socket, but there is only one socket
120GB SSD
1USB3 + 1USB 2
Windows 8.1 instead of OSX
for £558. Drop the operating system and it's under £500. That's quite a difference.
Of course, if you need OSX or thunderbolt ports it's a pointless comparison.
I've never used Pcspecialist, so I don't know how their customer service compares against Apple (important for tech stuff in general). The 2week delivery time is also a factor.