I bought it for two applications: scanning documents and converting them to text with OCR, and scanning old family slides. This is NOT the scanner to buy for either application. The cheap OCR software included with the scanner is virtually useless. My typewritten documents came out hopelessly garbled - it would have taken more time to correct the mistakes that it would have to re-type them from scratch. If you plan to use this scanner for documents, plan to buy a better OCR program to go with it.

As for scanning slides, the first unit I bought had a loose connection from the scanner to the slide attachment, and I had to exchange it. The second unit worked, but the scan quality was just not what I was hoping for.

I returned the HP and bought an Epson 3170 instead. It comes with a far superior OCR program, and Photoshop Elements to boot. I'm not sure the slide scanning is much, if any better. Could be I'm just asking too much from a flatbed scanner...

Great human interface, awful scanner (Rating: 1.00)
Review : The mission: archive old family photos before my lil' daughter tears them up.
The obstacle: very little desk space
The solution: not this.

First, the USB interface is far sub-par. Check HP's troubleshooting on their web site; their solutions to communication problems range from "use a powered USB hub" to "never use a USB hub." Very helpful. As I'm writing right now I'm hearing the USB interface bob up and down as it tries to connect with the scanner. Not working. Plus not only can you not use a hub (I tried a D-Link USB2.0 4 port), you can't connect even to the same USB bus. So unless you've got a spare USB header free from your motherboard, you probably can't connect at all (Amendment: After several hours I discovered the problem - for me, the scanner had to be on a powered hub but my Logitech USB mouse could not coexist on the same hub. Now things appear to be working since the scanner is on the hub all by itself and the mouse has been plugged directly into the workstation. Still a bad USB implementation, tho).

Image quality is so-so. Not the greatest... flesh tones are too warm. I used Photoshop, WinXP's Scanner Wizard and HP's prepackaged software - the best results being the TWAIN driver in Photoshop.

Speaking of which, the bundled software was harsh to use. For some reason it decided I wanted to scan my text documents as embedded objects in RTF's. Wha? The HP software was not good at all. The actual TWAIN Photo & Imaging Directory scanning interface was fine however - just the actually document management software was clunky.

Beautiful looking and a real space saver, but if it doesn't work well then it's just an expensive window.

Nice looking CRUMMY scanner (Rating: 1.00)
Review : Every photo we tried had speckles/dust all over them. I had no problems with the setup or banding (as others here did) but am returning the scanner because of pure quality issues

Nice to look at, poor scan quality (Rating: 1.00)
Review : I have an HP Scanjet 4C that has been a workhorse for the past 4-5 years (It still works, but my new Macintosh doesn't support SCSI devices). So, in deciding on a purchase I chose HP again out of loyalty. Set-up on the 4670 was easy, the software acceptable (typical of HPs), and the scanner itself was beautiful. Unfortunately all images that I scanned were plagued with 1/2" tall bands of light and dark areas. I found no way to remedy this and was forced to return the scanner for a refund.

Useless (Rating: 1.00)
Review : Looks nice, but took me 2 hours with HP tech service to find out that it didn't like my USB 2.0 connector on the motherboard. Apparently this is a common problem and they sent me a usb 2.0 hub to use.
Now that it's "working". It's unpredictable. Sometimes I'll scan multiple images without a hitch. Other days, I'm happy if I can scan 1-2 pages before crashing and having to reboot to continue scanning.
I expected better from HP. When are software and hardware manufacturers going to learn that end users want to use their products and not spend hours to set them up.

Nifty design, nice scan, but a little slow (Rating: 4.00)
Review : This scanner is versatile, compact, and makes great scans. It was incredibly easy to install on my 3.5 yr old computer (with Windows XP). In the short time I've had it, I've successfully scanned photos, negatives, and text using the OCR feature. The picture produced from the negative was about 3"x5", but was adequate for my needs. The text scan was produced by placing the portable scanning screen over an open book. It produced only a few text errors.
My only complaint is that it's slower than I thought it would be. It's still faster than my 3 yr old Canon, but not nearly as fast as the similarly priced flatbed HP scanner my sister purchased last summer. Perhaps when I have a big batch of pictures I'll still have to go to her house to scan them...