Summary: My friend has a 4670 and loved it. So I checked it out and the reviews were not all favorable. A lot of mention of alternating band of dark and light on color scans. I have not noticed this at all.
Summary: The scanner might be fine for Windows users, but there is no driver for Apple OS X. This includes Snow Leopard, Lion and Mountain Lion. The HP drivers only worked with the old Power PC operating system, and since the scanner was discontinued in 2005, HP has no plans to release an updated driver.
Summary: I purchased this unit a couple of years ago, because I did not want an all-in-one type printer. As a scanner it's more versatile, and can be used just about anywhere. For me, it solved a lot of problems. I like it very much.
Summary: I don't know why these mooks are giving this scanner one star. At worst its average. I work at a print shop I do graphic design and art. This thing is amazing. Granted the software sucks for new macs, but it is so versatile. For the folks complaining about depth raise the contrast to 1 or 2.
Summary: I have had this scanner for some time. Got it for its versatility especially with scanning from large books. I just confirmed with HP that it is not compatible with either Windows 8 or Mac Lion. and there are no updates planned at this point. Therefore, it unfortunately has gone Jurassic.
Summary: I bought my ScanJet 4670 new several years ago, and it's been nothing but rock-solid ever since. I've scanned tons of text, lots of color photos, portfolio clips and more. It's true, it isn't the fastest scanner at very high resolutions.
Summary: This scanner took me a while to find but, it was worth the searching for. It has a bunch of features that are unique to it. I love that it comes with the negative/slide adapter and that it is small and light weight. If HP could make one wireless, wow!!!
Summary: Just a warning to those with Macintosh systems. HP refuses to update their driver for this scanner to work under MacOS Lion, so this hardware becomes trash if you upgrade to the latest MacOS, or even buy a new Mac computer.
Summary: I have had this for several years and find it very useful. The slide/negative attachment works well (my mother is in the process of scanning boxes and boxes of old slides), and the transparent scanner that can be lifted off the stand and moved to wherever you need it is very handy for scanning parts...