Been looking for something like this for a long time. Have huge projects with many files in different directories. The switching between source and header works great with VS2008. This makes managing large projects (>1K files) much easier.
Works and fast.
Very, very usefull. I couldn't live without it anymore.
It does very few things, but it does them quite well. I find that it is by far one of the best plug-ins I've used, in regards to upping my productivity. Just learn the shortcuts and it becomes second nature very fast.
I use this in combination with a few other plugins to replace Resharper. This does file navigation much much faster than R#