I am a big fan of all things European/detective orientated, tops for me: "The Bridge", "Spiral", "Beck", "Wallander", "tatort", "The Fall" etc. I also spent a lot of time in Europe the last 25 years in the cities they are set in. As one other reviewer commented, I love first of all seeing all of these amazing places in time capsulated form in these dramas. I also love the patience in thematic and character development. All of these shows have amazing ensembles, high level acting, directing, cinematography, etc.
Now to "Spuren", I find Heino Ferch to be brilliant in the character, which seems to be one of little humor. The plots are a bit slower than some in development, but if you are looking for something to take you out of your familiar routine and at the same time revisit or visit Wien in all of it's beautiful and funky glory this series may suit you well.