It Just Works :)
VueScan makes me happy every time I use it - when I start it up it latches onto the printer/scanner (a Canon MP620) on our home network, is instantly ready to scan, and performs flawlessly - the scanner is easier to use from my iPhone than from my laptop - so much so that I often end up scanning with VueScan on my phone and then transferring the files to my laptop via Dropbox.
CarlRJ about
VueScan Mobile