Is a box spring needed?

No. It is a platform bed, so full mattresses rest directly on the metal frame.

Does it include a ladder?

The listing does not confirm a ladder. Check the box contents before buying if the top bunk needs one.

It takes two full-size mattresses, one per bunk. Thickness is not specified, so keep the top mattress low enough to stay below the guardrail.

Costway says adult assembly is required and tools are provided. Two people help with lifting the frame and aligning the rails.

Full-over-full bunks are sized for adults, but check the frame's stated weight limit before assigning the top bunk.

It is a fair entry point for a full-over-full metal bunk, since it undercuts most wood bunks of the same size on features alone.

2 stores we checked sell it, including eBay, Target.

At Target, for $179.99, as of our latest check.

$179.99at TargetChecked Nov 8

Compared across 2 stores. Prices are checked against each store and labelled with when.