I had to redesign my portfolio website recently, and as Coda had just been released by Panic, I gave it a try.

Of all the good features this app offers, the best experience I had with it was actually the Panic sans font rendering on the screen. It's sharp, rounded, very comfortable to read. I used to work with Monaco 9pt as I found it was the most lisible font I had to work with code, but Panic sans feels so much better, as you can see :