This route is for everyone. The tunnel area is new on a route with so many tunnels, which makes it special. For those who usually stop for a coffee or a soft drink on the route, there are several places such as Leitza, Lekumberri, Latasa. There is also a bathing area after Lekumberri.
I have a video of the longest tunnel on the 2.7km route, which took me about 7 minutes at about 25 km per hour, in case anyone is planning to do the route, I'll send you a video.