Most 35mm slides slide through the holder but every once in a while a slide gets crooked and requires the holder being pulled out to straighten the slide

Very time consuming, and the holder was very difficult to open

Scanning negatives is also very easy: you just use the appropriate holder and then slowly push the negative inside, center it, and scan it

The Epson has a horrible film holder but there are hacks that can fix this.

The scanner sets up easily and the slide/negative holders work just fine

Some pictures on Amazon and Youtube show multi-slide/negative holders which would make the process a little more streamlined but still the idea of a "standalone" scanner that can be used without a big enough lcd screen to see/preview your pictures is ridiculous.

The "frame" around the negative holder does cut off a tiny amount of the picture all around, so in some cases you have to move the negative left or right (cannot move up or down) to get the best/desired content.

The unit is well made but the negative holders seem flimsy

For microfilm, the sleeve for 35mm slides will work, no problem as a holder.

The holder is light plastic and did break, but th manufacturer replaced it for free!