Is scalable down to a small footprint. Is scalable up to a development platform, server, etc. Has a solid reputation. Runs on many platforms. Is used by a large development community.
Good documentation is important, but tools are arguably more important.
The initial project focus was on the creation of cross compiler packages for PowerPC and ARM targets. These are available for download on the web site, and the feedback I've received from people has been very positive. Cross compilers aren't really that exciting, but they're necessary for many. Linux target systems. One of the advantages of having the kernel and the OS configuration done by the same tool is that cross checks can be done.