redactle.net has no ads (I think; I have pretty stringent anti-ad measures in place) and a bunch of nice features that make the game more fun to play. For instance, you can configure it to always show you the lengths of the words explicitly, you can "annotate" still-redacted words with your guesses about them, you can put it in a mode where when you guess a word you also auto-guess its various inflections, etc. Also, it's actively developed (though less so than it used to be, because the developer has a small child). Definitely recommended.

And yes, it's a very interesting game, whether you try to solve it as quickly as possible (maybe spamming lots of often-useful guesses before you start thinking at all) or in as few guesses as possible (the best "snipers" have something like an 80% success rate at needing no guesses other than the title words themselves) or just play casually in whatever way maximizes the fun and minimizes the stress for you.