Applicability:
Since no cassette is, the film has to be yes "built into" a blank tape.
The used cartridge is quite easy to open.
If you have a suitable container (eg vase), you can plug the Nachfüllfolie also quickly and easily in the cassette (the second refill it went yet fixed). For me only one part of the film has reingepasst, but compared to the original (25m) is no-name film and 20m long.
For quality:
In previous reviews I've read that the film tears or faster by allowing more smell.
I can not confirm with me. Film is not broken and it also does not smell more than with the other original film.
Conclusion:
-good alternative to cassette
-Right easy to install
-Keeps quite long
-> Will buy again :)