A total of 3 reviews of this product on Reddit.
This sounds like a very complicated way of making cold brew. I just use this: https://www.amazon.com/gp/product/B01IVIPI18/
Fill the mesh with the coarsest grounds your grinder can manage, pour cold water to fill the carafe, close lid, leave in fridge for 48 hours, remove filter, done.
Of course, with a blade grinder, you’re probably going to get a lot of fines and grit that comes through the mesh. You might be able to mitigate this by sifting your grounds first.
I make my own. I have this and it makes about 4 days of coffee. On the 4th day I refill it in the morning and let it brew all day and overnight and then I have coffee ready for the next day.
I had a filtron for a long time and it was amazing, but it was also a lot of work to set up then clean. I just couldn’t make myself go to all that work for awhile, so I gifted it to someone. I ended up buying something that made smaller batches, but was much easier to clean – seems that it is no longer available, but there are others like it: THIS UNIT. THIS ONE looks like a decent enough comparable unit.
What I love about it is the metal filter. I just pull it out and let it drain into a coffee cup and then dump the grounds. No long draining times, no paper filter to mess with, no wool insert to clean. I set it up at night and then have coffee the next morning and it’s literally the easiest thing.
As to coffee – this is heresy around here, but for cold brew, I buy from the dollar store. It makes decent enough coffee and still has a caffeine punch and that’s all that matter to me. I’d never use expensive ANYTHING on cold brew – it just loses so many of the nuances, so dollar store it is.