They do more combos now but I prefer the serum by serum approach. Great stuff and very reasonably priced I find. The little bottles last a long time. Hot tip if you want to try them on sale: they do 40% off on everything ALL November. Every single year. They also have a different gift every week they throw in for free in each order.

I track what I use throughout the year and buy all every November. And also get some new stuff to try. It’s practically free this way.