This is a lightweight plastic box made in China, powered by a USB lead, with an instruction manual, one rack for four slides and another for six negatives. The CDRom driver didn't start installation automatically, so I had to follow the instructions step by step: right click on My Computer ... update driver etc and the installation was smooth. You have to work out which way to put the rack in, it clicks if inserted correctly. The most awkward for me was to figure out which way to place the slides and the negatives in order not to have inverted images. It would be helpful to have photos with numbers or letters to start with. Press on the left button to prescan a slide, the right to prescan a negative. Brightness and contrast can be tweaked straightaway. Then click the Scan icon to complete scanning. The photos appear on the desktop as "transparency0000, 0001, 0002" and "negative0000, 0001, 0002" etc. Cut and paste in folders, rename the photos. That's it. I choose 3600 dpi which is the highest resolution, my scanned images so far are between 600kb to 1.70mb. All in all, this is an economical product which produces excellent results for amateurs, more than enough if you are not looking for the highest possible quality. I have a few thousands negatives and slides, investing in a secondhand Nikon Coolscan or a Minolta Dimage scanner which I wouldn't be using for long is not an option. Patience is essential to work all this through. I give myself a year!
Amazon's Customer Service is as usual excellent. The USB cable was missing in the first delivery. I returned it the next day. The replacement arrived only three days later, and I don't live in Britain.