If you grew up on the original Kamen Rider Black as I did...then probably better to think of this as a completely different series, or you will likely be disappointed as I kind of unfortunately am. I really wanted to like it more, but it's hard to get past some things.
Character names are the same, but the main back story and everything else is very different (and more complicated). Definitely more dark & gory so more for adults than children where as the first one was more family-friendly. Don't get me wrong though - it has some really cool moments! And he does look pretty awesome once he's henshin-ed :)
(eventually)
But it feels like the fight scenes and the actual characters were much much better & stronger in the original series...even if it was 30-35 years ago!