PheasantCreek wrote: If you're proud of your espresso, I would suggest using little syrup so you are not masking the taste of coffee. If your embarrassed with your espresso or are not consistent, then I would suggest putting a lot of syrup.
As a consumer, I'd agree with Geoff. *IF* I decide that I'm at a cart or an airport location and the PBTC isn't really too concerned about quality, the coffee is pre-ground, the machines are unsupervised super-autos, whatever, and I still think I need a doppio, I'll have 'em bury it in a few ounces of milk and ask for *TWO*DROPS* of Hazelnut. "And... two drops of the hazelnut syrup, if you please, but really, just two drops, no more. Charge me for a flavor, whatever, but I really just want, literally, two drops." <PBTC pours in three quarters of an once> "Like that?"
Listen to your heart, and then listen to the customer.