The principle Gold Circle perks fall into two categories.
- Lounge Access - It might not seem like a big deal, but when you're flying every week, it really is a welcome break from the stress of the airport. Depending on the lounge, you can get anything from a couple of light snacks and free internet access to full catering services and showers.
- Flight privileges - Essentially you get to use your points to buy flights. You still have to pay taxes and charges though. I'm not flying as much as I sued to, but I still managed to get a pre-Christmas break in the Canaries for E40 when the flights were priced at over 200.
There are a few other ones like the ability to get yourself on flights that are sold out, but usually the price for that is so high, that you'd never do it.