Best Gutenberg Blocks plugin available

I use a number of block collections on my various client’s sites, and these are by far my favourite. If I’m looking for a suitable block for something, I will look amongst the Otter blocks first. They are brilliantly responsive across multiple screen sizes, allow sizes in all the units I need (px, rem, vw, vh), and arrange their settings wonderfully intuitively. The section and sub-section blocks are especially well conceived, and I’m finding that I can do almost anything needed without resorting to very much else. I don’t need the pro-plugin, but I’m increasingly thinking I should buy one license just to say thank you!