It's not bad, but it isn't great either.

All the different parts fit together well.

Matt Murdock is left in a decidedly different place at the end.

I think you should probably read at least three or four issues of DD that came before Shadowland started to understand the Shadowland setup. Also you should read the DD issues that happen during Shadowland. The rest I think are not particularly necessary.

I've just read the first issue of "Black Panther, Man Without Fear" and am unimpressed - very bland.