They're terrible. I don't rate any of the pod machines except the nespresso ones. And even those aren't really espresso.
I'm convinced all the delonghi btc "super-automatic" machines are basically the same inside, just different features on the outside - digital vs analogue controls, size of water container etc.
Best pod ones are the lavazza Modo Mio.. doing deal at the moment if you buy enough coffee give you a basic machine for a quid