I bought this scanner, like many others I'm sure, because I have many hundreds of old prints to digitise and it takes an age to do this on a flat bed scanner.
Using this unit, I don't need a PC, it writes to SD card so we can be sat in the lounge or take the device round someone's house and easily do some scanning. The unit itself is about the size of a spectacle case, so is very portable.
The speed of scanning won't cause any complaints, you feed in a photo, and it pulls it through in a few seconds. There is a fraction of a second delay while it writes to the SD card and it's then ready for the next photo.
Note you can still use this scanner with a PC if you require, but I have not done this yet.
The quality of the scans isn't brilliant, but it is acceptable. Resolution is capped at 300dpi and you're not going to get results as good as most flatbed scanners. For this reason, I recommend the device for scanning older home snaps where the quality isn't amazing anyway. For example, in my family, any photos before the early 1990s tend to lack crispness, so the quality of the scanner isn't a huge problem. Indeed, I find I can actually improve many of our family snaps by using Auto-levelling and other tricks in Picasa or Photoshop. Going back in time further, to photos from the 70s and earlier, you're really unlikely to benefit from higher resolutions.
However, if you have sharp, vivid photos from better cameras (which we seem to have from the mid 90s onwards - we must have finally bought a decent camera :-) ) then you are going to lose noticeable quality using this scanner. The results won't be awful by any means, and they will be perfectly acceptable to put on Facebook to share the nostalgia - just don't think you'll get a perfect facsimile of a decent photo print.
Note, this unit sadly doesn't accept 7x5 prints, so you are likely going to be restricted to older prints anyway.
For me, this compromise is worth it for the ease and speed of scanning. Put simply, I'd rather have hundreds of averagely scanned prints from the 80s than hardly any prints at all - and the latter is what I had when I had to use the flatbed.
A few important notes: First of all, the instruction manual is located as a PDF file on the supplied SD Card. It recommends that the unit be cleaned every 50 or so prints, and they are not kidding!
I hadn't realised the manual was there, so used my own SD card and started scanning away. After approx 50 photos I noticed horizontal lines appearing on the images.
The fix is to use the supplied roller cleaner widget and load it into the unit. A piece of rubber stops it from passing fully through and it is then supposed to be ejected out once cleaning is finished. This didn't seem to work smoothly for me, but turning the unit off and on caused it to eject and I could see clear lines of dirt on the material surface. This fixed my problem with the lines.
A swab is also supplied to clean the scanner head I believe, along with an alignment card which I used but probably didn't need to.
So, my workflow now is to scan 30 or so photos at a time and then do a roller clean. The last thing you want to do is find out that hundreds of your scans are spoiled.
The scanner also comes with a photo sleeve which they recommend you use for all photos. In practise, you won't see any improved quality with this providing your photos are flat - in fact you might see worse quality as the sleeve is an extra surface to pick up dust. However, where it does prove useful is when you have photos that are curled with age. The sleeve keeps these snaps flatter and therefore avoids problems with the print not sitting flush to the scan head.
Speaking of dust, I'd advise having a duster on hand to wipe each photo quickly before you scan it. A singgle spec of dust on someone's face can ruin a photo.
One final note - my unit stopped working completely after 100 or so photos and I thought it was broken. Every time I turned it on, it just kept flashing its light and wouldn't accept photos. The solution was to stop using my modern 4GB SDHC memory card and use their supplied 512MB one. 512MB is plenty of space anyway, as the scanned image resolution is relatively low. I find the average filesize of a photo is approx 700kB, which means you can easily fit over 700 photos on their supplied card before needing to wipe it. The unit now powers up much quicker with their card too - it was taking up to 30 seconds with my 4GB card, even when it was empty.