It is enough. I'm using one for a few months for professional web design and the macbook is completely capable to do anything I want. The resolution is great, the fonts are incredibly smooth to a degree where you don't feel that 1280x800 is low at all. Screen estate meant so much to me before but it's a different feeling altogether on a retina display.
Speed is great as well and I even have the first 13" rMBP. In the beginning I was very picky, visiting apple stores almost on a daily basis, comparing rMBP and cMBP side by side, noticing even the tiniest fps differences (which were fine, btw).
Scaled resolutions are also great, scaled 1440 HiDPI is far better than native 1440 and the speed difference is unnoticable, if it is even existent.
In the end none of that matters at all. Once the mac was a few weeks old I stopped thinking about all these little and worthless things and after an initial "Omg it's so pixelated" when I got my iPad Mini, I start to believe that all these Retina resolutions don't matter in general.
I could've just gotten a MBA and be just as happy.