Product review (4 stars): Great water table - except for the plug design. Read the reviews for pointers!
We just assembled this today, so this isn't really a long-term use review.  It seems to be pretty sturdy, and is rather easy to assemble EXCEPT for the plug that keeps the water in.  I am using this indoors until it warms up outside.  My son is newly diagnosed with autism and LOVES playing with water.  I am planning on using both sides filled with water rather than sand.  Thanks to another review, I noticed why our table was leaking horribly.  Literally every drop of water leaked out of that side all over my kitchen floor.  There are, indeed, two lips on the plug, and if you look at the directions, they don't really explain the installation of the plug well at all.  You can't simply "work" the plug in with your fingers.  You can push it down, but it will not be water tight at all.  Even if you use your fingers to pull it down from below, it won't do anything to help the situation.  I had to scrape, pull, bend, and push that plug into place, bending my nails back and making my fingers really sore.  I tried the butterknife trick, and it did help a lot, but I do think that this "simple" piece should be assembled by the manufacturer or the assembly should be made easier somehow....perhaps a plug that screws into place maybe(?)

On a side note, an unexpected complication - my potty-training son found it irresistible to pee into.  Eek.  Not anyone's fault, though! :)