Ii love that it came with it all ready to program in Python.
I struggled to get started with Python on the Mac, but I've only had it a few days. I have been using Unix and Linux for years so I thought Mac OSX would be easy enough to get used to, but so far I haven't quite come to terms with it.
Using the pre-installed apps is brilliant, but trying to do anything beyond that has called for a lot of Googling.