On ours, the toppers on each end have 2 rubber stoppers on the bottom so that the top won't just slide off the table. I believe they're also magnetized.
Make sure you have enough clearance for any items you want to store in the table, and that they won't intersect with the stoppers if you add those.
Lost the ability to smell and taste. Both slowly started to come back over a few months, in the end I want to say it took at least 8. It doesn't seem quite as good as before but it's mostly back to normal.
As for other long term effects, I seem to have been mostly spared except that whenever I get a viral infection, I usually have terrible joint pain.