Good question. I spent most of the weekend setting up all my stuff. C1 was OK, wasn't flying, but very workable. However, PS had some issues. I had to run PS in one of the native resolutions as it currently cannot support retina. Using the native resolution requires some weird scaling, and without the dedicated graphics processesor, things were not good.
I loved the size of the 13", but it went back Monday morning. I ordered the 15" wtih 512G SSD, 16GB Ram and 2.6Ghz chips.
It will be a lot bigger, but I think this is what I should have done in the first place.