Yeah it's a bit of a let down as you see pictures online yet what you see with your eyes isn't the same. Apparently it can look spectacular but I've not seen them look overly impressive with the naked eye. I saw them last night and also in Iceland and both times, it's cool but to the visible eye, not all that special a sight.
The most interesting thing I've seen was in Bali, on their day of silence. Long story short, it's a day whereby you have to stay indoors all day and at night, no one on the island is allowed to put their lights on. No cars or bikes on the streets and no flights either.
It's the opposite whereby pictures sell it short, the most amazing view of the stars I've ever had.