I prefer the mason jar with a metal filter, super easy and makes a ton. County Line Kitchen Durable Cold Brew Mason Jar Coffee Maker with Handle. Glass Jar, Stainless Steel Filter, Flip Cap Lid - 2 Quart, 64 oz https://smile.amazon.com/dp/B07VJJJ764/ref=cm_sw_r_cp_api_glt_fabc_JKE91YM8K1TDDEXR3PA9

Yes I got a cold brew maker from Amazon that has a very fine stainless steel mesh filter.

Works better than a double layer of cheesecloth.

https://www.amazon.com/dp/B07VJJJ764?ref=ppx_pop_mob_ap_share

I ordered the Hario Mizudashi, I am looking forward to trying it for rtd cold brew ( 1 : 13 ratio)

I do my cold brew concentrate in a Mason Jar

Worth it or not is probably up to you. For cold brew, you don't need a fancy brewer really. I started just using a quart mason jar and filtering through my chemex. I found a 32oz quart jar to be too small (wife and I both drink cold brew) so I moved on to a 64oz mason jar, same method.

This is ultimately what I bought, although I didn't end up liking the stainless filter in it and went back to just mixing grounds and water in the jar and filtering through my chemex. https://www.amazon.com/Coffee-Handle-County-Line-Kitchen/dp/B07VJJJ764/ref=sr_1_9?crid=1P7J5S9Z07EQP&keywords=cold+brew&qid=1663941763&sprefix=cold+brew%2Caps%2C193&sr=8-9