This funnel is one of the only few that allows to tamper with the funnel in place. Which also allows for even quantity of coffee up to the walls of the basket. Which is what I was looking for.

However, the funnel is very loose on my 58mm IMS basket. The external diam. of the IMS basket is 68mm, and the internal diameter of the part of the funnel sitting on top of the basket is 71mm.

Plus, the funnel cone is too open (meaning: I wish the internal "walls" of the funnel were more "steep"), which is not that convenient for stirring the coffee (WDT tool) inside the funnel.

This funnel sits outside the basket rim which makes for an easier groom.

BaristaSpace 10pcs Magnets Espresso Coffee Funnel for 58mm Portafilter

BaristaSpace 10pcs Magnets Espresso Coffee Funnel for 58mm Portafilter

The design looks great and may work well with some baskets. It doesn’t hold tight to the IMS basket on my Breville portafilter. I wish it had a stronger bond with the magnets but it should do the trick.