The only moving parts here are the turbines. Not only do we have plenty of experience with running turbines (since every other power source uses them), but they should all be independent from one another, so a failure of one doesn't lead to damage or require a shutdown, it just means you're putting out a little less power.
The maintenance may not be that simple. If the article is right about temperatures at the base of the tower reaching 194 F, fixing a broken turbine will be literally hellish. I wonder how they plan to do it.