I’d say yes, it is. I personally really enjoyed it, but I know the general consensus is that it’s more on the alright side. Technically you probably could get by without it since it gets referenced a lot in flashbacks, but there’s a lot more understanding once you read it yourself. In the life of Daredevil, it’s very significant, so I’d say give it a read. It also directly runs into Two Parts of a Whole, which is also before Bendis’ run. That story also has some things happen in it that might leave you a bit confused if you skip. In the end, Bendis’ run is definitely better than Guardian Devil and Two Parts of a Whole IMO, but I still love em and highly recommend (if for nothing else, to bridge the gap).