3)How easy is it to Transfer Documents,
Transferring documents is easy, but you may need to ensure that they can be read and edited on the Mac.
For a heavyweight user you might need to include MS Office for Mac. Free options for reading and saving MS Word and Excel are OpenOffice.org or NeoOffice, a Mac-specific version of it. The Apple iWork applications do a reasonable job of reading and saving in MS Office formats, and are cheap downloads from the App Store.
MS Word documents can be read in the built-in TextEdit application, but anything complicated can show up distorted.
Some Windows file formats are unreadable on the Mac, period. MS Publisher and VIsio are examples I am aware of.
Demon since forever, HomeOffice MaxDSL since 2006 via Netgear DG834G router
Mac Pro 2.66GHz 4GBytes / MBP 13" - Snow Leopard plus Centos4 & XP Pro in Parallels