I agree with that suggestion. You feel nothing at all. I use the 5 mm size and really thought the claims were exaggerated until I had to use a different cheaper brand. That hurt!
Tried the insulin syringes and they hurt! Since switching to pens I've used several different brands but recently they've been inconsistent. Some injections are painless while others sting. Wondering which ones perform best in your view, and if the ultrafine ones are worth trying. Anyone used them? Appreciate any info.