Been using it for the last four months - super easy and convenient. The only issue is that the syringe adapters are specifically designed for BD syringes. Other brands still work, but for some reason, the fit is optimized for BD, which affects how deep the needle goes.
So, a good tip might be to use a 1.5-inch needle if you’re planning to use this auto-injector. It works for both IM and SubQ injections.
Here’s a video explaining the different sizes:
View: https://youtu.be/mnMF4lRLnss?si=sTKSHUbBXPRkP3z6