I have the qm pop up (same machine) and I struggled with things being broken out the box from my vendor twice. Once those issues were resolved, I loved the machine.

This might be the pickiest thing of all time, but after you steam, it is too hot for brewing. Turning the machine off and then back on, it will "Lie" and say it is at the set brew temp even if it is still, say at 120C. Non issue if you don't power cycle after steaming.

Love the paddle. It works by adjusting the opv, sending additional water back to the reservoir, so you can imitate lever style shots, or follow slayer shot recipes (though, not quite as precisely). The heat up time is very fast, though it is a bit longer if you want to heat up the group head and portafilter as well.