I have been using this for a week now and believe it's enough time to know if I like it or not, and I do. I used to use the Mario Badescu Glycolic toner years ago and I was enjoying the benefits of the glycolic acid, until the castor oil in it broke me out. My skin is super sensitive to oils, and also to scrubs or stimulation when it comes to exfoliating-I will break out, get super dry or get tiny bumps. However, my skin works really well with naturally extracted peels like glycolic, papaya enzyme or lactic. You just have to know your skin, and after 15 years of trial and error, I do lol. Hopefully it won't take you as long! My skin is naturally more oily but It's Winter now and super dry out, so that does affect my skin too. The toner has definitely shrunk my pores and made an extremely even skin texture. I always had breakouts since I was a teenager (I'm 33 now), but broke out extremely bad about 4 years ago and was left with a lot of hyperpigmentation and indented scars. Micro-needling has helped tremendously with that (try it if you haven't!!), but that works more from the inside (naturally speeding up our collagen production), so I needed a good product to help even from the outside. Anyways, I wouldn't use this twice a day as it recommends, I wouldn't even use it once a day, every day. I'd day every other night after you wash your face, before serum and moisturizer. I did start using it every night, and now have noticed some dryness and a tiny bit of pink patches, so just my skin's way of saying "ok I like this, but not every night". I like that I know and understand most of the ingredients on the list, although I wish it was shorter, and for me personally, the rose water, aloe and ginseng extracts luckily work well with my skin. Also, the price is just awesome! Just make sure you have a really good moisturizer with hyaluronic acid, niacinamide and/or glycerin in it (NATURAL hydration) to follow up with. I use cerave PM and my skin drinks it up and loves it.
Just get to know your body and skin from the inside out, don't be mad at it for getting irritated or breaking out, that just means it is speaking to you and telling you what it best for you. Manage your stress, eat well and use clean products. Hope this helps!