Note: I think the plans were slightly incorrect. Add 2 more 2x4s @8' long (construction studs will do, you don't need 96" length) to be certain you have enough wood. I bought 15, planning to add the lower rear support rail, but then I found I didn't have enough decking. So I scabbed it for decking. Then I didn't have enough for the stairs, so I found some 2x4s in the garage that gave me 5 out of the 6 stairs. The next day I made the last stair. So buy 2 or three more 2x4s than the plan says. The worst that can happen is you have an extra 2x4 sitting around for a while. As for all the other cut items, just don't mess up your cuts and there is enough material.
This was pretty easy to build. It took a lot of work for just me, working by myself. I think the thing is VERY sturdy. We had about 200 lbs of adult and kids up there and it didn't seem to be complaining at all.
I used no glue. I think I was too focused on getting the project completed that I forgot to apply glue at the several steps where she mentions to apply glue.
I did not use Kreg(R) brand screws.