Ditto. There are many computers that are not under my exclusive use, so I can't put Sublime Text 2 on them in good faith. And they're invariably Windows machines. I can throw Notepad++ on them fairly harmlessly, and the utility it provides is awesome. In a plant environment, its search functions are darn near magic for parsing SCADA logs.
I'm little curious on their no time limit evaluation and a license to buy for continuous use model. Is it just a good faith agreement to buy it if you intend to use continuously or it can be enforced later if it's detected it's used regularly?
The biggest reasons are being able to open projects and view all of the files in the project (and search through all of them) at a quick command. I really liked the themeing functions. Multiple OS compatibility (I regularly switch between macOS and Windows), so I needed a client that is used basically the same on both OS's. And one license is for all of the computers you use, and on all operating systems.
The more I use it the more I like it. Sometimes I have files that still open in N++ and I quickly switch out of it into sublime. Oh, did I mention at the command line (in OSX) you can open files using the subl command (Very awesome).
Searching through files in my project is one of the few reasons i keep terminal windows open next to N++. A quick `find . | grep "php$" | xargs grep "search_term" -isl"` or even `grep -Ilir "search term"` is never too far away, but it would be great if it were closer.
My other nitpicks with N++ are the lack of a "yes to all" on the change-detection dialog when you do a hg update, and the way gedit seems to do ctags so much nicer. Seems like low-hanging fruit, maybe i should try to get a patch in..
Still, hard to beat and easy to recommend. I use it every day (it bought me a car!).