It really makes a big impact on the extraction!
I got all sizes. I was curious as it has a unique shape. Of you love experimenting, these baskets are worth a try to dial in and get a different kind of flavour. Because you have to go a bit coarser, and the convex shape with holes towards the middle somehow helps in removing the astringency that would have been there. It produces a smoother, milder cup that many would find palatable. I tried this with classic Italian beans, a 100% robusta blend from South East Asia, and a single origin Columbian. The BoB basket makes it smoother, at least that's what I'm getting :) The single 10g is suitable for ESE pods, if you're into that thing though it seems to be not so common these days...
really wasn't expecting much out of this basket, but boy was i wrong. since i've been using the basket and the BIT shower screen i've gotten so many compliments on our espresso tasting smooth and flavorful. even extraction, very little channeling...AMAZING crema. makes for tasty double shots, lattes, and latte art❤️