I believe OCaml's syntax does suck, but I don’t think this article gives a compelling argument as to why. Missing an `in` turns a let expression into a top level binding and kicks a syntax error often a long way down the file, making it very hard to identify the cause. The relative precedence of let, if, match, fun, and the semicolon is unintuitive and hard to remember, making me want to add loads of unnecessary and ugly parentheses.

On the other hand, I like that there's little overloaded syntax, and the meaning of different characters is fairly consistent.