Easy to set up, easy to use but there are a few flaws.

The negative holder is fiddly and the holes are not in the right place in line with the perforated bits on some negatives, meaning they are always out of position unless you force them in. The quality is decent, but by no means perfect, so go for a pricey one if quality is key. If it's quantity and a cheap toy to get a few old snaps backed up, this is more than adequate.