It is nice interface to use with good visuals. Certainly much more upmarket than the Nokia GUI. I'm still finding my way round the various settings/options. There are some neat features like the ability to configure what widgets you have on your home page and the quick link for selecting flight mode and switching bluetooth off and on.
One thing that is missing, or I haven't found yet is the label that shows what profile you have selected.
Has anyone else tried SPB shell, What do you think of it? It's good I'm not sure I want to pay $30USD for the registered version.