Newdent Sorry for the late reply. Wanted to use it for a couple of days before I can comment.
1- Workflow is decent (Far better than the DF64 that’s for sure).
a- Calibrate and hold the setting the knob (If you don’t tighten it, it will play and lose the setting during grind).
b- Weight your beans and RDT on the little shovel provided.
c- Run the deva and pour. Close the chute after or you gonna have projectiles coming your way.
d- I usually do 20g doses and it takes around 15-20 seconds to grind.
e- Turn the grinder off and on. You will see a large clump drop down.
f- Continue as before in your process.
2- There is NO EXCHANGE. Literally none. Retention is extremely minimal (0.1-0.2) and usually are fines clinging for dear life on the walls of the inner chamber.
3- It is one of the most silent grinders I have used. It is more silent than a niche and DF64 for sure.
4- Grind consistency is fantastic. I think it is due to the feeding mechanism where the beans are being fed by the speed of the motor and not with bean weight atop of each other.
5- Mazzer burrs are a win. The shot in espresso is your typical Italian type of shot. Perfect mix of clarity and body so that you can use it in both Espresso or Latte. Tried SSP HU on it and wasn’t that good with Lattes (Espresso was perfect though). SSP Lab Sweet incoming
6- Cleaning and changing the burrs is a cakewalk.
7- Variable speed is a big win at the price point. High speed for espresso and low speed for pour overs.
8- The kopiconcepts team was fantastic in their support. Kudos to them.
1- Don’t expect high end level of cups (Levercraft, Lagoom). It’s your typical 64mm flat.
2- Battery powered is a decent option to have but have no use for it at the moment. (I have been using the same charge though for 5 days of 3-4 cups a day and it is still showing 4 dots (which is full).
3- They had some QC issues as stated before but it seems they resolved them. A buddy of mine received his black unit perfect.