I went for this in the last woot, a couple of months ago. Here are my impressions:
Hardware: Works great. yes, you can line up a ton of papers into the feeder, and it will go through each one individually. I only had it fail to do this correctly once, out of maybe 100 scans so far.
It's pretty fast. If you double-sided scan a bunch 20 color sheets, it shouldn't take over 30 seconds. I haven't timed it, this is more of an impression, so yer mileage may vary. Suffice it to say it's plenty fast.
It scans and OCRs about any size and orientation of paper. If you are a neat freak who has to have all his PDFs exactly vertical/horizontal, then you won't like it, because a tiny bit of rotation occursquite often, but it doesn't seem to affect the OCR at all.
Software: You can put a bunch of single page receipts in and tell it they are single pages, so they are all separate documents. Or you can tell it to combine them all.
When you scan something, it will go itno a queue to be processed/OCRed. I have a pretty fast machine, even with that sometimes it's a little slow. but in general, it's not a big deal, and it lets you know what document it is processing and how big the queue is.
There are three types of docs: receipts, business cards, and documents. The receipts and business cards OCR very well. And the receipts quite often seem to adjust themselves to find some fields that are in the same place on the same company's receipt.
The documents do virtually no OCR, except that they are searchable. So you can look for a word in a document, but the filing isn't so automatic.
The categorization is pretty good if you are an accountant. If you are trying to replace your filing cabinet as a normal human being, it's a little wanting. I have been told by Neat, however, that a new rev is coming out late this year which will allow hierarchical folders for categories.
All in all, I'm happy I bought it. It has some SW shortcomings, but it does most things very well.