And it could use a lot more development. The interface is somewhat flawed. There are no keyboard shortcuts and no support for cut and paste. Although the interface is somewhat flawed, the developers of this software clearly put a lot of thought into the design of this software. It's relatively fast, much faster than NCSA Mosaic and Netscape.
Configuration is fairly simple, and much of it can be done via menu.
There is, however, some manual editing required to fully configure the software. Cello also supports several protocols internally. In addition to ftp and gopher, Cello supports telnet, ph, and mail protocols internally. Unfortunately, this is a browser whose potential was never reached. Perhaps most importantly, there is no forms support.