User friendliness: 10
Tested on a TI-89 OS 2.09 HW 2.00.
This is a fast, excellent, useful, and safe program.
Main reasons I downloaded it: small font capability. When you use the built-in text editor, the font is quite large and you find yourself scrolling around a lot. With uView, you can just add "#1" to the beginning of the text file and you instantly read a lot more text on the screen at once.
Aside from that, the program has lots of other formatting features, such as tabs and underlines, that make it useful and thought out. I definitely recommend this program if you frequently use text files.