Reusing Filtron grounds : Coffee

Morning Everyone!

I read a review of the Filtron cold brew maker, which alluded to Filtron suggesting that users reuse their grounds to make a second batch. I checked Filtron’s website, and sure enough, they have a note (see step 6) remarking about reusing grounds with 1/2 as much water.

Has anyone tried or regularly reused their grounds with their Filtron? Would you recommend?