Can 
affect my equipment ?
The magnetic layer interact with iron metallic parts. It is therefore important to properly select the location of the magnetic label for the best production process. However, testing is always important when lauching a production line.
Can affect my printing speed ?
No, once you have set up your production line with labelling M le Magnet you should be able to process at normal usual speed.
As for any new set up, a validation test is always advisable