Reporting my experience with the Discount Shelving glass cabinets.
A truck pulled up in front of my house with a 1000 pound pallet-crate. I asked the driver pretty please and he got it in my garage for me though he complained a bit. I opened up the crate with a crowbar (a little dramatic, could have used a power or even regular screwdriver) and there were 3 boxes inside for each cabinet. The heaviest of these weighed 58 kilos and even with assistance from a construction worker I enlisted we had to open them on the crate before moving them due to sharp turns in my house including on the stairs. The largest pieces of glass were 4 feet wide and nearly 6 feet tall. Carrying everything upstairs was an hour-long affair. It's possible to do by yourself but only if you have experience moving stuff like this.
As for the assembly, the instructions are garbage, like if Ikea made their own "draw the rest of the fucking owl" image. Before you add any glass to the base of the display, you're going to want to screw the bottom railing base down then add the bottom railing to that base and hammer it down with a rubber mallet (not included) so that by looking at it from the side it's really down in there good. Mallet on the rollers to the bottoms of the doors and secure the top railing to the ceiling glass piece (this part is a bitch, hope you have skinny fingers). Now you can attempt to follow the instructions and have a chance of not having to undo any steps. You probably will though because the walls have a "right side up" that you won't be able to eyeball before you get it wrong. Doing the assembly alone is also possible, but barely. Pro tip, you can take the doors off and put them back on even from a state of full assembly, you just have to lift them up and pull them towards you. If your doors are rattling or don't close evenly then you'll need to do this to hammer the bottom piece on better.
When you're done, they're beautiful. I recommend.