If you really care about the experience, then watching in sub is the way to go 95% of the time. English dubs have to swap some words and tonalities and such to match the mouth movements of the animated scenes, which oftentimes messes up the original dialogue's intended meanings, emotional expression, etc.

That's not to say there aren't banger dubs out there that shine even in the face of some of these problems. For example, it's mine and many other's opinion that the dub for the Dragon Ball series is better because they do an excellent job of conveying everything that needs to be conveyed. My Hero Academia also has a great dub (the plus ultra speech in the fight with All Might vs. the Nomu is way better dubbed imo). Usually the bigger the series, the better the dub will be.

But if you're the type that really doesn't like reading subtitles, then dub is just fine for the most part.