This was a great project to do. I have a family member that paid that full price for the real Pottery Barn piece. I then made this one and showed it to them. Ha!
I used Alder ply but because of the expense I only bought 1 sheet which will run $90-$105 from Menards or Home Depot. Other lumber yards ran up to $140. I got all the pieces out of 1 sheet except for the 2 adjustable shelves which I used birch ply. And you can't even tell. I was going to make my own jig but just bought the Kreg pocket mini jig. Invaluable! and about $20. I found the overall cost from the plans to be under reality. Acrylic, hardware, and hinges will run you $70-$80 easy. But I guess if you use cheap pine or something than maybe you can be close to the estimate.
As queried by others, I too found the plans to specify how to attach the top. I used tiny "L" brackets around the underside perimeter and attached them with my screw gun to the frame (pic attached). For the doors, I didn't like the idea of just screwing the acrylic glass to the inside of the door so I routed the inside and attached some plastic tabs I found in the screen door section of HD to hold them in place. (pic attached). You could also use small mirror clips installed upside down.
I wrestled with the color choice for a long time but finally found the Minwax Gel Stain Mahogany (which is different than regular stain mahogany) to be the right color. After staining and a coat of sealer, I glazed, let dry, then sealed some more. Finished it off with some supa-fine steel wool and paste wax.
I love this piece now because I only glued certain pieces so that I can take it apart and put it back together as I am moving soon. (out of country). The European hinges were a bit of a pain to mess with since they have some movement to them and only lateral adjustments, no vertical. But it came out great. (I think)
Thanks so much for these plans!