This one is supposed to store 66 bottles. However its a tight fit if the bottles are larger than the Bordeaux type of bottle. There could be a bit more space between the shelves for larger Burgundy bottles to fit well.
three bottles to a shelf is very tight.
Otherwise I am satisfied with this product.  It is well priced and is quiet. I installed it a month ago and so far all is well. We'll see how it lasts in the long term.