I'll start by saying that the Metal Matte palette is more expensive [$60] compared to her other eyeshadow palettes [around the $46 mark], but you are getting more shadows then is usually included in her palettes; thirteen matte shadows, and nine metal crush shades - and the metal crush shades sell for $21 individually. I think that this is their holiday offering this year (they do have a collab palette with TooFaced coming in December though).
The matte shades are a medley of neutral, slightly muted vibrants, vampies and pastels, so there is something for every comfort level, every season and every occasion. The pigmentation is awesome, and the shadow formula is very soft and buttery. When I dip my brush into the shadows they do have some kickup to them, but they aren't patchy and apply with only a little [if any] fallout and blend really well, so I generally don't feel that removing a lippie in my reviews is really necessary as long as the ease of use and performance isn't affected - just tapping excess off your brushes solves the problem.
I am thrilled with the look and feel of the matte shades, but the metal crush ones are... Woah. so smooth to apply and molten looking, in a nice mix of vibrant shades and more 'everyday' metallic pops. The shade Synergy is a popular shade in the permanent Metal Crush range, but the other eight shades are new. The only slight niggle I can think of with the metallic shadows is that the shade 'Tinsel' contains lots of micro-shimmer, so feels a bit gritty and has some fallout - it does perform well once applied, so I feel that removing a lippie is too harsh.
I really enjoy my Serpentina palette and thought that was fantastic and unique, but Metal Matte manages to beat it as you have everything you need/want for a complete eye look in the one palette, whereas I need to use another palette alongside the Serpentina palette as it has no practical shades in it. I definitely reccomend getting hold of Metal Matte, and judging by the YouTube & Instagram raves, I'd get it sooner rather than later - I don't think that this palette will be around for long.