For the seasoned switch enthusiast, all you're really spending the $20 on is the holy pandas, halo switches, and maybe the box jade. However, it's a solid sampler set if you're new to the game. Holy Panda is the holographic card in this booster pack and it helped me decide if I should buy the pandas in bulk for a build.
I had never built my own keyboard before, so I was unfamiliar with the differences between the switches. This was super helpful in deciding which switches I wanted to put in my board. I'll definitely use it again in the future next time I want to "switch" up my keyboard.
I did buy this before realizing there were larger sets available from Drop, but I ended up sticking with these. There's a good chunk in this set to choose from. I am a first time keyboard builder so I bought these before choosing which switches to go for. I am glad I got it first to feel out the differences rather than choosing a random switch type, and it's nice to have a compact and less expensive sample set like this one available.