Not the warmest reception for newbies with questions but the staff seem to treat the regulars well.
System is definitely confusing to a newcomer. You order your dessert (there are no prices posted and many of the items are not marked so you have to ask what they are) and espresso drinks at one counter then if you're dining in, you pick up your order at another counter then have a seat. When you are done, you leave your dirty dishes at the table, you tell the cashier what you had and pay on your way out.
I had a cappuccino and a chocolate cream puff. The bitter dark chocolate ganache (chocolate glaze) contrasted well with the flaky pastry and the light chocolate cream filling which was not overly sweet. The cappuccino was strong and paired well with the dessert. On my way out I sampled the Tiramisu gelato, it was way too sweet for my taste.
This place is open till 11pm every day, popular with the locals, with a high noise level from all the different conversations going on around you. Now that I know the vibe of the place and how the system works, I'm hoping my next visit will be more pleasant.