Scanner technology has improved a lot in the ten years since I bought my old Epson Perfection 3200 Photo machine. It was quite good in its day as far as flat bed scanners with transparency hoods were concerned.
I often wonder, though, whether it's working to spec given the inevitable bumping and shoogling it's had as it was moved from house to house and room to room. When I scan 6x6 negs I'm always amazed at how sharp the results are - much, much sharper than 35mm. Obviously, the bigger negative plays a large part in that but there are occasions when I look at 35mm scans and worry if the negs were actually sharp to begin with.