I was concerned when I first unpacked this table, as when I purchased it, it wasn't clear to me that the table remains in two halves with the net attachment the only thing that keeps the two together. As it turns out, I didn't need to be concerned, as the two halves are completely level, and easy to adjust side to side and up and down to get a perfect alignment, even on carpet where my table is located. The casters have a secure locking mechanism which also prevents movement. My young son, who loves playing table tennis, knocks into the table all the time, and it hasn't budged. Because there isn't a mechanism joining the two halves, they can actually end up taking slightly less space when stored in it's upright position. This table was listed high up on a top ten list, and the lowest price of any of the others, and I'm very happy with the recommendation and purchase.