I tried it for a while. And yes, it breaks the monotony of eating the same amount of calories every day and it's nice to have one day where you can say, "hey! I can eat just a little more than usual."
I got confused with the math, though, and just went back to usual routine. But for me it didn't make it hard to go back to lower calories. In fact it was
harder for me to eat MORE. I'm pretty set in my ways with how much I eat every day and there were times where I had to practically force myself to eat more food. Or I'd forget that I was having a day where I could eat a little more and just end up with my usual calorie amount anyway.
I started zig-zagging calories because I was majorly stuck on a plateau. However the zig-zagging did nothing to make a difference for me. But that doesn't mean it won't work for someone else. Some people have had great success in getting the scale to move again by cycling calories.
As long as you stay within your range, I see nothing at all wrong with cycling. As far as getting into the habit of eating more and worried that you'll get stuck there, it's simply a matter of control