Pfft I think you have to put it into context. I mean, it's a drain. In theory, it's supposed to be a long tube. But this one has big junctions, steps, valves, noises, ladders, eels and a plughole of death. Surely that makes it an 'interesting' drain? I liked it anyway.
Numerous drainers, spoilt by pics of better drains arent aware that you really have to take Bunkers seemingly lacking merits along with the knowledge that its the drain that started drain exploration in the UK. it might not be the best anymore. But for years it was.
Plus everyone keeps going in from the wrong end. You gotta start at the upstream end where all the good stuff is.