How exciting!!! We have a thread favorite
Listen to Bigbuttons, I think it was her recommendation originally, she really knows her stuff!
I have tried the Hada Labo Gokuyun lotion tonight. I'm branching out to Japanese drugstore products 
Very fluid, almost like water, slippery texture, absorbed quickly. Well that's what my essences and treatments do too, nothing new here, so whacked an Innisfree sheet mask on top (read on Reddit that Hada Labo really boosts masks, and that's why I bought it). Now my skin is sticky with blackberry jam (Innisfree) and plump and glossy (Hada Labo, I think). My science homework is to learn more about hyaluronic acid, starting here
Ilovetosleep you can pair the Good Night with pretty much everything: serum, essence, lotion, your favorite moisturizer, after a sheet mask. I've been testing different combos like a mad scientist and here are my favorites
Serum + essence/treatment + sleep mask
Sheet mask + sleep mask
Cream + sleep mask
Use it like a night cream or a final layer after letting some more liquid products absorb - it is quite close to Cerave PM in texture and feel. I've also paired it with Eucerin 5% urea cream and that worked too, but I would not pair it with very rich creams or mineral oil based creams like Nivea as they already have excellent occlusives. The sleeping mask acts as a final occlusive layer to prevent moisture loss. Good Night is not very hydrating on its own so I prefer to use something under it, but anyone with oilier skin might disagree. You could start with anything you have at home. Here is a review.
Choc I have really loved the Missha Super Aqua Snail kit (hydrating, more lightweight, great for summer, from Missha Germany) and Laneige White Plus intro (creamier, a colder weather product for me) kits for my dry/normal skin. Although both are mini sized, there is plenty to play with (Missha is bigger).
Lucysmam I wonder whether you have just come up with a homepathic treatment for spots - the product on your shelf, your skin pretty and blemish free!