Whether you've seen the original Danish/US versions or not this is worth seeing. Great direction, acting & scripting with it's own flavour due to the particular differences in culture between France & Britain and how that differs from the the cultural differences relevant to the Danish & US versions.
I dipped my toe into the original Danish version but found the cultural references too obscure & the whole feel of the show too unfamiliar/foreign to really relate. Plus it's always difficult with subtitled shows, you really have to grab my attention for me to stay & it just didn't. I quit after a few eps. The US one I barely lasted 2 episodes, just didn't like the way they interpreted the dynamic between the two leads & the cultural tension aspect. I started watching the Tunnel without realising it was also based on the Danish original and it grabbed me from the start. I liked the characters better, there was a lighter feeling to it than the US one so it gave relief from some of the grimmer aspects of the show & generally felt it was more accessible to an English speaking viewer with some knowledge of British & French cultures.
Whether or not you've seen The Bridge (Danish or American) this is worth viewing. I am well into the first season and loving it so far. So happy to have found a version of the story that I can watch & sink my teeth into.