I've had mine with the Aldi greek style yogurt & it was yummy, I've also used the Lidl (I think) ff yogurts which work just fine.
Oh I made sorbet, hmmmmmmm, ok but not sparkling, I'll not try that again.
I think it's a case of experimenting & seeing as only 1 yogurt is used it's not much waste if it doesn't turn out ok!