Tall and reasonably compact
We didn't get even a third constructed on this before our cat Ollie decided it was his new best thing ever and started climbing on it, playing with the mice (that were on boards still on the floor). Upon finishing construction, he settled in on the topmost platform and we had to coax him down so we could move it into its final position.
Unfortunately, within a few days one of the bottom posts had the fabric covering come torn off which was a shame.