Summary: I have a huge collection of transparencies and negatives that are in all formats; 35mm to 8x10 as well as prints. The ScanMaker i800 does a very good job handling most of the sizes. For 35mm I would use a separate scanner just for that size.
Summary: I have owned this scanner for 5 years. Started off with WinXP. When upgrading to Win7 x64, it wouldn't work. Contacted tech support who said it could not run with Win7 x64. Made it work with Win7 x64 by manually inputting the registry entries. Has worked flawlessly for the last 3 years.
Summary: I have had the i800 for three years and on many occassions it has stopped working and caused all my USB ports to freeze. I have installed it on a Dell, a compaq, an Asus, an MSI, and an EVGA motherboard. If I have the scanner plugged in then none of my USB ports work.
Summary: I've owned this scanner for 3-4 years. The calibrating on startup is annoying, but I've learned to live with it. Had trouble installing it on a Win 7 x64 system, but finally got it working and since then it has worked flawlessly.
Summary: This is one of the most disappointing pieces of junk I've bought in a while. We bought this scanner for its negative/slide/photo scanning capabilities. It did all of those things well until the warranty ran out. Then without warning it just stopped functioning.
Summary: For the past 8 years I used (pretty much daily) and LOVED my ScanMaker 3800. So my expectations were high. Boy was I ever disappointed? The drivers refuse to stay operable, so I have had to uninstall and reinstall them over a dozen times?
Summary: I purchased the Microtek ScanMaker i800 flatbed scanner over a year ago and am well pleased with it. The main reason for purchase was that this scanner would scan negative and positive films up to 8 by 12 in in size, which it does very well.
Summary: I work for a museum that has a number of different negative formats in the collection. It is very hard to find transparency scanners that are able to scan sizes other than 35mm, let alone any size.
Summary: The absolute worst online purchase I have ever made. The software included was not the software advertised or included with the manual, and after a month of contacting their support team (e-mail only, no phone number to talk to a real person) I returned the product.