I used one because timing is a element in my theme. I also put a start next to it so that if you miss you just fall down onto another track.
The doors aren't that hard to work. First, they stay open for a long time. Usually, you can start working on the door as soon as you see one in the room. It will probably stay open until you get there. Yavn originally said you would have to be close to the doors and switches to work them. Either the area they work in has been greatly expanded or that requirement has been dropped entirely.
Second, there are four symbols so when you see the matching symbol just count 1.. 2.. 3.. 4(click click).
Third, I have to double click to open it. My advice.. Click soon and click fast.
If you need a place to practice you can come to my ride. It's only one room and the track loops so you can ride continuously until you get it. Don't be a door hater! They can be neat if they're used right. Embrace life's little challenges!