Yep, like Michael says, it can be intimidating doing a complex corridor at first.
And truth be told, there are some things that really drive me crazy with them. But they are also one of the most-powerful and flexible tools in the Civil-3D arsenal.
I know when we first started, the Corridor Properties dialog looked like an IRS tax form. But after working with them for a while, we can do some amazing things in very little time.
There is a whole different class of "standard errors" that are easy to make when doing survey work with Corridors. It takes some new processes and procedures, because there are different "likely errors", and therefore different procedures to make sure errors don't happen, etc. But these days, when everything goes right, the work a single tech can calc in a day might have taken two-three weeks using Land Desktop.
It's very hard to get Surveyors "into the flow" of using C3D, especially since some key support is missing from C3D out-of-the-box (that's the entire reason the Sincpac-C3D exists). And the learning curve is disturbing. But once you get through it, you turn into a real "calc'ing machine", the way one of my customers called himself.
There's still those times when work with C3D comes to a crashing halt, until some new problem can be identified and worked-around. But those times are getting fewer and further-between for us. There's still a debate in some corners of the Land Survey world, about whether C3D is worth it, or if staying on LDT is better. We don't even view it as a choice. C3D is so much better than LDT that they aren't even in the same class. But it takes quite a while of working with C3D to get to that point. (Training helps immensely, but it still takes time.)
