If that's helps - I've got my solution for excel - on the go, 4 months ago, and just very happy with this kind of solution.
I have galaxy 4S that is allways connected to the internet, and connect to my "at home" laptop through a desktop's remote control software - TeamViewer all the time, so I have the mobility of my phone - so I can take it anywhere I go. and also the full power of the excel because I'm controlling and viewing my laptop through my phone (and I need other software that Available to me only on Windows-constraints of works)
for me it's ok that it's comes with small screen , I'm looking for mobility - and full fonctionality of excel and other WIN programs.