hi i use the reedle shot 100! i don’t have super sensitive skin so i personally didn’t find the 100 to hurt at all, it felt kind of tingly but that was it. i started off by using it every two days, but now i use it every other day / am considering using it daily bc i think my skin can handle it… and at some point i’ll probably upgrade to the 300/700/etc. but if you’re just starting out and afraid of how your skin might react you can start with the 50 + space out the days you use it and work your way up from there! the pdrn essence is something i bought along with the reedle shot during black friday; it’s kind of marketed together bc the reedle shot is supposed to mimic micro-needling treatment that allegedly helps your skin absorb skincare better after and pdrn is the active ingredient in rejuran healer skin booster, a type of injection treatment in korea that most notably stimulates collagen production and has other touted benefits as well. i don’t really know if vt’s pdrn is doing allll of that but i can tell that my skin is better because of it + the reedle shot :) it has quite a milky, slightly sticky consistency so i actually layer the pdrn on after a few toners and serums bc the reedle shot is usually the first step of my skincare routine after cleanser and a watery toner, and then i go in order from thinnest to thickest products before finishing with moisturizer. i hope this helps anon!