One of the craziest roller coaster rides in K-dramaland! First of all, Tunnel is not as good as Signal, but it comes very close. Both Signal and Tunnel have their own ups and downs - while Signal has slightly better writing when it comes to the "time travel", Tunnel has more emotion to it, which makes you care more about the characters and what happens to them. Tunnel is an addictive roller coaster ride from the first to last episode. It is full of excellent twists, acting and even some feel-good bromance. What more could you ask for?! Some people say the writing got worse towards the end, but I didn't particularly think so. The writers really did an excellent job and the ending is great as well, full of emotion. Don't get me wrong, I know there are some flaws but this is a production meant to entertain people, and for me this is a 10/10 in entertainment value, and therefore I give it an overall 10/10. I had SO much fun with Tunnel and I already look forward to the staff's next drama, which I hope will be another thriller. Simply brilliant! Don't hesitate to give Tunnel a chance, you won't regret it!