I have the Joanns large craft table, it has the same casters as the table you are looking at. If one breaks, they are impossible to repair. I found that as long as my table doesn't move for any reason, I can put the caster in place and it won't fall out. That's the only thing I would be concerned about.
I just have a sewing table with an extension so I can make the table larger if I'm doing a larger project. The table came with a small cabinet, the size of a 2-drawer file cabinet, and I put it to the left of the table and put my serger on it.