I'm generally weary about cult following on products because I get confused on if it's just what's popular or kind of like you, a lot of reviews are from people who got the product free.
For me, babyfacial works wonders. It is the only mask that I feel like is actually exfoliating/regenerating my face to the full extent and I'm actually quite happy that, even though I have extremely sensitive skin, this product is able to give me results without harming it.
I will say, I recently incorporated retinol into my skincare (not sure why, just wanted to try out DE's new retinol) and forgetting that retinol should never be in conjunction with the babyfacial, my skin peeled....for days... (but it did give me a nice exfoliation lol-- would not recommend).
My face is amazingly softer, it helps clear up any current acne that I have and it also makes it smooth. I sound like an ad but it really does work on my skin. If you are ever able to get a sample at a store close by, I would say try it first. I generally try samples before purchasing products because I never know how my skin will truly act.
As far as the Tatcha Vitamin C serum-- I love it. When this was first released, I saw a ton of good reviews and as I was reading, I noticed almost 90% of the reviews were because they received the product, with the essence, for free. I went to a local store, got a sample of it and tried it out. This was the first and only vitamin c serum that actually sunk into my skin, didn't sit on top/feel sticky, and I actually woke up to plump/brighter skin. I decided later to get a sample of the essence to try it out and hated that it worked so well. It is actually almost like a primer for product. I wouldn't say the essence is necessary but it's more of a luxury to have, if you ever want to incorporate something like that into your skincare.
I did respond to someone else on this thread about what vitamin c serums I've used but again, from my exprience actually paying for the product (twice now and plan to repurchase), I love it and think it's a great vitamin c serum.
I almost always breakout with product so when I discovered the Tatcha line (after the drunk elephant line, which my skin adapted to quickly and the product wasn't as effective), I was pleasantly surprised that I finally found a vitamin c serum that I was happy with.
I also hate recommending this product because it's SOOO freaking expensive but I do own la mer's the treatment lotion, moisturizing soft cream and creme de la mer and their concentrate and use this product during the week that I dermaroll and my skin recovers so, so well. This has another cult following and the price honestly hurts my soul but for what I use it for- it gives amazing results.
Sephora sells dermarollers on the site and they help product sink in. If you are ever interested in benefits of microneedling, I've checked out owndoc.com for years (I'm 30, have been studying skincare/acne scarring since I was 18 because of cystic acne from when I was a teen) and I am happy to have found the website. I've had lasers, chemical peels, etc. and have realized after spending thousands of dollars that there are much less, evasive ways to help skin clear up from acne, hyperpigmentation and scarring!