This is another excellent series from Finland that can probably only be appreciated by a Finn or someone who has lived there. I come into the latter category. An added bonus for me was that the action was set in Hamina, just fifty kilometers from us and we often went there on a weekend. I never tired of marvelling at the concentric street plan - a defensive device from when the city was fought over by empires.
The series is billed as a comedy as well as a crime drama. I don't want to labour the point, but scenes that had me roaring with laughter as being so idiosycratically Finnish would probably leave most foreign viewers cold. It was all done in the understated way typical of the country. I particularly liked the doctor's holiday premises and why he was there.
As for the crime aspects, these were so darkly comic that despite their ridiculousness, there was still a sharp frisson of tension. I didn't guess the identity of the poisoner but it was clear the main suspect wasn't guilty.
I watched the lot within a day. At the end, I was sorry that there weren't a couple more episodes to keep the chuckles going.
It's so hard to recommend or not. I would say try it and if you don't "get it" no harm done, you can give up. As is obvious, I loved it.