Running water through more than once will make the coffee a bit bitter. Probably fine for the machine.

I'm struggling to appreciate the worthwhile difference. It's just the size of pod by the looks of it. So yes, double dipping is far cheaper than a new machine.

Personally, I find that most blends are fine being topped up Americano style, or as I mostly do, with microwaved milk. Does it just as I like.

Meridian owner since 1992
Prime & PSU, Focal Elear headphones, Roon (ROCK 8Gi5 NUC), Explorer 1 & 2, F80. 200/203, various Sonos (via Roon).