I have used maybe all russian bride sites in the past and all of them were expensive as hell (charged by credit or pay per letter and stuff like that). I lost thousand of bucks and results were: 0!
Using RussianGirls4u is different in a great way: NOT expensive at all (monthly membership for VIP upgrade) and lots of nice women. Seriously, can't be more happy! Already had a chat with many nice girls from Russian and the Ukraine and I am already scheduling my trip.