I have it as well. It's not good if you need to bear down, but I bought it mainly for sandwiching quilts so I didn't have to kneel on the floor anymore. It's too high for me to cut on - I prefer to be directly over what I am cutting so I get a top view and not a slanted view.
The quilts I make aren't huge so the size is fine. The table opens quite large but folds up and squeezes into a corner. The wheels do lock so that helps sturdy it a bit.
Sometimes JoAnn's has one open. If not ask if they'll open one up for you.