Should needle insertion be felt?

I have had about 20 hours of blend on my face. Should I be able to feel the needle insertion or does that imply that it is being improperly done? Sometimes I don’t feel the insertion, just the juice, but other times I do feel it. Thanks in advance for your advice and experience.

None of us can be perfect.
What you describe is what I would expect. If you said that you feel the insertion EVERYTIME, I would say that you need to look elswhere. Feeling it only some of the time is to be expected. Most of the time, you should feel only the warming sensation of the current. Frequently, if you feel the insertion frequently, the probe is not sized correctly.

James-Thank you for your informative response. I appreciate it!

If the probe is too large what is the upside and downside? Bc I felt every insertion this time around.