some are exagarated and some are just that, hope and they work perfectly and if you look at what happens the good idea is to see them working perfectly in any case, the best you look around are the spreads, the spreads sometimes and most of the time are the commisions that brokers take home, and the best are the brokers with low spreads, say you have GBPUSD, the best would be 0.4 the highest I have seen from a broker is actually 5