This was not my first time to eat le sfogliatelle, but it was always as good as the first time.
Some would say it's a must, some others would describe the delicious taste, I won't add much here since it is definitely been mentioned several times, but I would say it is an important part of the Napoli visit experience.
Enjoy the delicious taste and the beautiful Napoli.

During my visit to naples I stayed at a friends' house. As a local, he told me that is unacceptable going to Naples without trying these particular sfogliatelle: and he was right! I ate them on my last day there, after having tried them in other bars/cafes (where they were good,too).
But the best part here is that they serve them right out of the oven, they are steamy and tasty, and the smell itself makes you melt!
They were so good I ate 2 in a row!
Either you decide to eat sfogliatella riccia or frolla, you will not regret coming here!
Do not miss this place while in Naples!

It was really crowded place , as there was big queue. But it's worth to be in queue to taste awesome byte of hot Sfogliatella. Staff is really Quick. Very near to Napoli garibaldi train station. Must visit for nice authentic taste.

If you want to eat the best Sfogliatella in Naples, Antico Forno Attanasio is the best place.

Them Sfogliatelle are a marvel in the mouth. Apart the wonderful Riccia and Frolla Sfogliatella you must taste the fantastic Santa Rosa Sfogliatella.

Get them hot out of the oven. There has ALWAYS been a line here when I've visited, but the staff does their best to get through it fast.. so remember to say grazie! Look at the display cases for what you want (if you can get close enough!) then go to the far left to the cashier, get a number right away and then pay for what you want and show your receipt & number and explain and get what you paid for when your number is called. Keep in mind they do not make the numbers increment... it is automatic... but you won't be skipped, just let them see your number slip if you see the display has advanced a little past yours before they call yours. A tip, if you KNOW you want to get some before leaving Naples by train or however, you can go in the morning (before you go about your last visits in Naples) order and pay for what you want to take with you; then pop in later and just go to the cashier and pick up the package which is ready to go! No standing in line when you know your train leaves in 20 minutes and worrying you might have to forgo your prize take-away sfogliatelle! They won't literally be hot from the oven, but they should also travel better because of that same fact!