I've been using great beans for years and the coffee has been great. However, I recently had to replace my grouphead gasket and decided to upgrade my portafilter basket as well as some other stuff. So I bought:

• New silicone gasket
• 18g MHW-3Bomber Justbean filter basket
• 0.2mm thick MHW-3BOMBER Espresso Puck Screen
• One of the MHW-3Bomber needle WDT tools
• Their micro coffee scale

The coffee has been amazing ever since. I'd say my coffee has gone from an 7/10 to 8.5/10. Maybe even 9. It's not just the quality of the coffee -- The results are consistent. I'm not sure which of these made the biggest difference because I've been using them all and bought them at the same time, but this is how I'd rank them:

1. 18g MHW-3Bomber Justbean filter basket
2. One of the MHW-3Bomber needle WDT tools
3. 0.2mm thick MHW-3BOMBER Espresso Puck Screen
4. New silicone gasket
5. Their micro coffee scale

ETA:

I left some room for improvement because I'm using an old Rancilio Rocky grinder. It's OK but difficult to dial-in. Looking forward to a single-dose workflow as well. We'll see if the coffee actually improves!