I think this scanner is great. It is very fast, does two sided scans in a single pass, and is incredibly fast. The ADF is a bit flimsy, but I guess that's because the overall footprint of the scanner is very small to make it very portable. There is also no outfeed tray, so you need to have room in front of the scanner for the outfeed.
I'm also very happy with the Brother scanning software, iPrint and Scan. It also comes bundled with PaperPort software, but that produces scans with a watermark unless you upgrade (purchase) from Nuance. I was going to do that, but decided it was totally unnecessary since the Brother software works so well. One feature that is great - you can scan additional documents ( as in when you have too many pages for the ADF ) and add them to your PDF with the simple click of "Add Pages) button.
All in all, this is a great addition to my home office. Did I say that it was FAST! And quality is excellent.