I have only recently joined GDI, but am genuinely impressed with the ease of the system and their friendly and prompt replies to my queries. My main interest is flamenco dancing, and I originally joined in the hope of making some extra cash to buy costumes, which are expensive. I now believe that it can go much, much further than this, and can't wait to get some more serious advertising under way!
Read through as many testimonials as you can, and write down all the member tips that you think would be particularly useful. You then have them all in one place to refer to.