pps
I also used MANY libraries becase my c experience is larger than my c++ :), and I really feel that boost library is one of the best libs around and it's not "..boost isn't finished...". It's work in progress and every release version is quite finished product.
While that's true, it's also true that we have work to do in the ease-of-use department.
It's difficult to compare boost to qt (in my opinion) becase qt is related to some particular domain (gui etc) however it has many thing in it but all of them are interconnected. Boost is an umbrella of very useful libraries http://boost.org/libs/libraries.htm (so, boost is a collection of libs, and qt is a framework) and boost libraries do not necessarily have any dependencies between each other. What do you mean by splitting library etc..?? I personally find boost bo be a very neatly packaged library. I'm sure after you get yourself familiar with boost you'll change your opinion.
We could do a lot better with packaging, but we're working on it. -- Dave Abrahams Boost Consulting www.boost-consulting.com