TailwindUI is fine so long as you don't want to customise the blocks they give you. As soon as you want to do that you're in a world of pain.

Example: I wanted to use their "Hero Sections - with angled image on right" without the navigation where shown (was going to add a standard top navbar). As soon as you delete it, the angled bar doesn't reach to the top. I ended up keeping an empty navbar in that place to keep the block looking right.