Ran your post through the gap check. It's well written — that's not the
problem. The problem is what the reader is silently asking and you never
answer. Three questions, in the order they'll occur to someone reading:

  Q1 — "Okay but did it actually help YOU, or is this generic advice?"
  Your post lists benefits. It never says what changed for you
  specifically. The reader's guard goes up at benefit lists; it drops
  at "my lower back stopped hurting by week two." Answer this in the
  first three lines or they scroll.

  Q2 — "How long until I stopped hating it?"
  Everyone who's considered a standing desk has heard "your feet hurt
  at first." You skip the adjustment period entirely, which reads as
  either dishonest or inexperienced. Naming the rough part — and when
  it ended — is what makes the recommendation credible.

  Q3 — "Do I need the $600 one or is the $150 one fine?"
  This is the actual question stopping the purchase, and the post
  doesn't touch price-to-value. You don't need a buying guide — one
  honest sentence about whether the cheap one was enough closes the
  loop.

THE REWRITE MOVE
Don't add three sections. Fold the answers into what's already there:
open with Q1 (your specific result), work Q2 into the middle as the
honest caveat, and land Q3 in the close as the practical takeaway. Same
length, three silent objections handled.

The post as written informs. The post with these answered converts —
because it's answering what they're actually thinking, not what you
planned to say.