The parts are fragile just like any model kit, and you should definitely not put it next to other electronics, near metallic objects, or on an unsteady surface that will frequently get bumped. It is also highly recommended that you get a battery backup so you have several hours of extra time during an outage for the power to either come back on, or for you to remove the ball safely.
The fragility, however, doesn't just apply to this kit. The real prop has almost every single one of the posts on the small wheels broken off. So if you do have an accidental crash or break something, you could think of it as "free weathering" and is actually prop-accurate
. I do also make a replacement parts sets for just such an occasion, if you choose.
I have also seen people customize their bases with panels and greeblies to make it more "star warsy" and use a thin circular piece of craft foam on the top to act as a cushion in case of a fall.
I say all of this but my personal globe has lasted YEARS without a single issue. There is no friction and the parts do not get hot during normal operation so there's not really much that can break down over time. I know several people who have had theirs floating non-stop since the beginning (6 years now) and have no issues.