I used Riddle Shot only at night. 
My routine was 

Riddle Shot → toner (I used a thick, sticky toner) → serum → cream → regeneration cream.

After applying it, my skin felt drier than usual, so I applied a generous amount of cream. 

I heard using a sheet mask instead of toner might be good, but I didn’t try it because my face felt a tingling sensation. 

There’s a noticeable tingling feeling when you apply it. 

While there wasn’t any redness or itching, I felt like I had reached my limit and decided to stop.

I noticed visible effects on my pores. 

However, I didn’t see much impact on exfoliation, blackheads, or whiteheads. My skin texture became generally smoother.

Although the recommendation is to use it frequently or daily, sensitive skin may struggle to tolerate even one use. 

I suggest starting with two or three times a week and gradually increasing the usage.