What do you like best?
Beautiful code editor that makes editing code...fun again!
Some of my favorite features of Coda 2.5 include: Sync, Instant Preview and Git Control. Of course all of these features are wrapped up into a beautiful UI which fits nicely within the MacOS ecosystem.
The instant preview feature allows you to view all of your code changes live, right from within the editor, no browser refreshing!
What do you dislike?
The lack of plugins, i.e. extensibility.
While Coda does support plugins and has quite a few plugins that are freely available to their users, your options will be limited. They simply don't have the user base of some other code editors, namely SublimeText and Atom, and due to this, you won't find the same level of plugins within Coda as you do those others.
Also, lack of updates...seriously, a $100 code editor should be seeing regular updates! Many of the open source editors are seeing regular updates, new plugins and more very frequently, I expect a premium product to do the same.
Recommendations to others considering the product
If you are working with the latest and greatest frameworks/languages, I would recommend looking elsewhere. However, if you are a front-end developer and need a reliable work horse, Coda may be just right for you.
What business problems are you solving with the product? What benefits have you realized?
As a freelance designer, I often find myself in a situation where building out some of my designs is a requirement. Although this is often my least favorite aspect, and I am not much of a coder, it has to be done and to do so, I need a reliable code editor.
Coda was my true love for quite some time, however, as my process changes, Coda did not move along with me and I have since had to change to another editor.