Recently someone was advertising their UI kit and it got me wondering, who uses these? There are so many of them out there so people must be buying them.
To me however they seem like more work than they are worth - if you're a designer, you limit yourself to a predefined style, while taking it into a different direction feels like more work than building an element from the ground up.
If you're not a designer, you're not going to be able to do much with an UI kit, unless it has the exact layouts you need already put together.
Are there any designers who use these? If so, why? Have you ever heard of anyone buying them?