A nice solution to a tight problem
We have a small house, and the space available for basement access is very confined (63" long, 24" wide). Prior to these stairs, we had a ladder for access, since there was no way to build a conventional staircase or spiral stairs. We were going to build a set of alternating tread stairs when we found this.
The stairs arrive strapped to a largish skid, approx. 40x40". It is not light - 200+ pounds.
After opening it up and inventorying parts (kit includes allen wrenches and a bag of spare
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fasteners, beyond what's needed), I was pleased with the quality of the components. Metal parts are sturdy, heavy-gauge steel. Welds are neat with good penetration. Paint is even and neat. Stair treads are laminated hardwood (beech or birch), well-sanded and finished. Overall, quality is high and parts consistent.
Instructions are a little on the vague side, but if you read them carefully a few times it makes sense. The metal sections telescope into one another, and are secured by five setscrews that dog them in place. There is enough clearance between the sections so that each tread can be leveled and trued using the setscrews. It's best to level and align each section as you work your way down.
The stair treads are unmarked and have to be individually marked and drilled. It goes quick if you make a template from your first tread. Railings are easy to install, require some trimming with a hacksaw.
Anchored the bottom bracket into the concrete floors with wedge anchors set into epoxy, instead of the supplied plastic concrete anchors. I didn't want it to move. Ever.
I spent about 6 hours on the job, from framing out the attachment point for the top support to installing the railings. It takes some getting used to (make sure to figure out which is your dominant stair-descending foot and install treads accordingly), but is feels very sturdy and safe. The treads are very smooth, and would benefit from some non-skid tape on the surface.
Overall very pleased with the stairs.