I am a CPA who had been using a Fujitsu ScanSnap and needed something a little faster (pages per minute) and with a little more capacity on the amount of pages I could put into the Automatic Document Feeder. I would say that the speed is great, capacity is improved, but it is not quite as user-friendly as my old ScanSnap (there is a "ScanSnap Manager" tool for the fi series, but not the "ScanSnap Organizer" function I was used to). I guess there is a little "give and take" when it comes to "upgrading" to a bigger, faster scanner.