I had espressos last January at Irwin, but I was a virgin and wasn't sure if it was good or great. I did enjoy them except for the tiny cups, those were bullshit.
Was there lots of foam on top? Was the foam brown or yellow-ochre-brown? Did the espresso smell of anything other than generic coffee? Was there a strong flavour other than acidic?
There are physical limit reasons for the tiny cups.