Very little about this scanner is perfect. I read the reviews before buying it but soon discovered a number of very annoying shortcomings. I use the scanner to scan batches of twelve slides. First, if you are using this with a Macintosh computer, regardless of the programme or the model, you will have to constantly activate the scanner by maintaining the app at the forefront and clicking it after every scan. There is no such thing as walking away for a coffee or even working on the computer with a different app as the scanner works away in the background: the scanner simply falls asleep after every second slide. This has been noted by many other reviewers, well over a year ago, but even with the latest update it remains a problem. Second, the scanner accurately ""sees"" the slides in preview, but when it proceeds to scan them it gets about one in ten wrong, meaning it mistakes a vertical slide for a horizontal one. These will have to be rescanned. Third, do not buy this for the colour restoration programme, it is very disappointing. Maybe, if you are an expert, you can fiddle around with it and adjust it, but otherwise it is a definite no no. Fourth, the on and off button at the bottom is incredibly flimsy, it can be hard to switch the thing on. The good news is that if you manage to gather the patience to sit next to the scanner and keep it going, the results are reasonably good. The dust removal is very effective and probably the best feature of this scanner. That's about it.