Did not have high expectations for this scanner, but I think that the menu is very well thought out, the unit is running properly - German quality and nothing gives the impression of Chinese production. The internal memory of 32 MB is sufficient to scan 4 pictures, then has to be changed in the USB mode, the images to be transferred to the PC and then delete. With a 4 GB SD card can fit about 400 photos on the device and it can be completely offline an entire photo collection to be scanned. The device can be beautifully used in offline mode to clamp whole picture archives with relatives. The Diaschlitten enables very fast scan vast quantities of slides, here you realize the Rollei also builds slide projectors. The execution is very high and makes a stable impression. Scanning both SW negatives, color negatives and slides is very fast. The exposure levels are manually adjustable. But of course, the quality is not enough to repro studio ran scanner with infrared capabilities that would be the detection of dirt particles possible. I operate the device to a Mac and have no problems. The included software is for Windows and also allows editing of the scan. You can even eliminate image errors. The price performance of the product is true in any case. Those who want more should at least 600-800 euros to invest for a slide scanner with infrared hardware correction of aberrations. This then allows a quantum leap in earnings. For my needs, the product is sufficient, however, and pleasantly surprised me as a result. The quality is good, as described in the test of a photography magazine. In low negatives, the result may well be nothing. Currently there was a scanner at Aldi - which corresponds fully to the Chinese standard of quality. The slide does not lock properly and the device has a very poor workmanship. The Rollei scanner is very well made and has even 24 months replacement warranty from Rollei. So strong buy recommendation, the price-performance ratio is very good.