Season 1 was good. The entertainment value was enough to overlook some of the quirks (plot cracks, we'll say). I was excited to watch S2, and it started fairly well. Then, it quickly fell apart. I only finished it because I had made it that far.

Some mystery around characters is great, and I applaud the show for not using plot armor too heavily. However, the way they present problems and solutions one after another gets old fast.
[spoiler]Especially toward the end of season 2 when Mia and Jasper infiltrate the lab. So von Fürstenberg didn't notice that he had a different phone? I seem to recall he was in active communication with someone and so would have likely been checking his phone constantly. Then, it just becomes unrealistic: Jasper parks his car BY THE GATE and hops the fence. There is a lucky fire in the lab and this _secret_ lab has a fire alarm, yet no sprinklers. I digress.[/spoiler]

I couldn't keep track of everything wrong with the show. Mia is seemingly superhuman, and the baddies are not very observant. That being said, I did park my butt for 2 seasons, so it was at least good enough to keep me watching. Although...

I watched this in part to grow my German language skills, and I did pick up some nice slang! Perhaps, if it was in English, I wouldn't have continued to watch.