Your review: I ordered these and a microscope. Someone packed everything in together, meaning the microscope box pretty much ruined all the slip covers. When we opened the box glass went all over the floor. I managed to salvage maybe 20 of them. All the slides were okay though. I would recommend ensuring better packaging next time. I work for the post office and I know what the mail goes through to get to your address.
Pros: Works well with scopes, easy to use.
Cons: You'll probably end up with more broken glass than expected.