I know a few people who have some different pod machines - sorry, I can't tell you which ones - but whenever I've had a cup from one, the Nespersso has tasted better. I also think the machines I've seen look better than, for example, the Tassimo ones,
But - I have an issue with pod machines in general. I get that they're convenient, but I think the coffee per cup is pretty expensive, the "standard' range of coffee available is limited and the environmental impact of the pods is still unresolved for me.
I know Nespresso run a recycling scheme but they're still making an awful lot of the things. So I'd be looking for a refillable pod that would allow me to buy my own coffee and reuse the pod.
I'm aware I can get a bit preachy about this and I have a bit of a chip on my shoulder about it, but I think you get a better quality and value cup by buying a "proper" espresso machine. Better-value still, get an Areopress.