I have always used Theorie Shampoo, Conditioner and Mask for the longest time. However the Theorie mask (although good quality) needs to be in for at least 5 minutes to start the magic.
The macadamia oil mask in comparison to an already high-end product competes very well. The mask works wonders and is super fast to use in the shower. Makes your hair feel super soft and has relatively safe ingredients.
It is a tad bit pricey and the small bottle is much more affordable, but the investment is worth it. I will still always use my Theorie products since the ingredients are super good, however, this mask has almost permanently replaced my use of Theorie Mask.