Just bought it, I went through the same process myself so I definitely support the product and know the pain of creating this thing! :D

Few things bother me though, main one being the input variants (large) are not there, neither are cards.

Also, If you resize an input, shrink it/grow it vertically the input field sizes, I feel this is counterproductive (not a behavior bootstrap has, and not enough to make a large type input as the text size is different (I fixed the symbol's height so not much hustle there))

As of right now, the kit is not complete enough for a regular bootstrap user.

Nice things to have would be label size variants for inputs also (I mainly played with inputs)

This being said, you did a really awesome work dealing with nested symbols, those are really obvious to use, and expect a few unexpected behaviors (input fields changing heights) you did an amazing job with responsive (that slider is awesome :))

Do you plan on tackling those soon?

Hope this was constructive, this is really a great start, just not full enough for what it sells to me. But it will definitely be my go if you make improvements!