These style self assembly wine racks have been aground for over twenty years which speaks for itself really. They are an extremely efficient way of using space to store wine bottles. Occasionally you get the odd non standard bottle which is a tight squeeze to fit it in. They do advise securing the larger racks to the wall to prevent them falling over, but by and large I have found them very stable as long your base/floor is level and even. Which brings me to assembling it. Unless you allow yourself plenty of time and have a completely flat and level surface on which to assemble it, you are going to have a very frustrating time. Having chosen my construction site (which may not be the installation site) I found it best to lay out the front metal grid first with the "teeth" point upwards so I could drop the interlocking cross grid into it. Then firmly but not forcefully carefully align the wooden pegs' cross cuts over the lattice to push them into place. Choose the first ones carefully at various strategic points across the grid to give it some stability before filling in the gaps. If a peg is resisting being placed, do not force it and check the cuts are properly aligned. If you try to force it or have chosen an uneven surface for doing this on then you risk either bending the metal grid and/or causing the whole structure to distort, or it even falling apart causing endless frustration (believe me, I have been there!). Once all the wooden pegs are in place then lay the rear flat plates on it paying attention to the corner cross pieces. Again choose strategic points on the grid for securing the first nails to keep it stable before systematically gently tapping/hammering in the rest. Once assembled you will have a fine bit of kit for storing your wine which should last your life time. Carefully move to its final position. Ideally all this should be done with someone helping you, but it is possible to do all this on one's own.