All the pieces are very well labeled and even indicate which way should be up. Instructions are very clear also. I'm petite, but I had no trouble putting 99% of it together before needing hubby to hold the top/mantle (though I could have assembled it on it's side and done it alone, but it is massively heavy). It did have a minor splintering at the bottom of one door, but I used a colored marker and you can't tell even close up.

This is an absolutely gorgeous fireplace. Worth every penny. My only regret is not purchasing it sooner!