I have very dry, eczema prone skin and the 100% squalane is great for keeping my skin hydrated and non-flaky. I apply it at night, ideally with a moisturiser over the top, and then wake up with nice skin. It's much better than the rosehip oil I was using before.
I haven't tried the cleanser but I think it depends on what you want - if you want to clean your face but keep it moisturised, go the cleanser, and if you want to moisturise, use the oil. Some people do cleanse with oil I think but that's outside the realm of my skin care knowledge
Everyone is different though. Because my skin is so dry, I've always tolerated moisturing oils very well, and generally don't break out from them. Whereas people with more normal or acne/pimple prone skin might find it more difficult.
Oh also, I used their hylauronic acid which other people rave about, but it was a bit of a dud for me.