The Brits have always known how to create a realistic depiction of daily activities of a police district, without constant shootings and chases, with officers rather "ordinary and boring" than driving luxury cars and wearing fashion clothing... Although there are dozens of frosts-morses-lewises out there, there is always room for more - and DCI Banks is another good result, pleasant to follow also then when the course of criminal activities or solution is not totally to your liking.
Alan Banks is certainly the very leading character, but he is not a lonely wolf, but a team players (with some reservations), depending on his colleagues' judgments and opinions - thus different from Frost or the Swedish Wallander, for example. I have not read any of Peter Robinson's novels, but I find Stephen Tompkinson a talented performer here - particularly bearing in mind that he has had more comedy roles to play... The female detectives, however, tend to remain somewhat sketchy, despite having different looks, approaches and background.
Anyway, a good series recommended to all fond of similar creations, without too much oppressiveness and violence. You might want to watch the episodes in sequence and without episode splitting, otherwise some nuances and events related to the characters' private life may remain misty.