User experience is terrible from the start - they do not reveal prices for using their service until you log in, only hinting at a 'credit' system. Once in, you are mislead to think that buying credits will get you access - it doesn't. The various pieces of information you have to pay for, and the associated charges are totally opaque. Just clicking around will make you spend your credits with no warning, and gives you barely any new information beyond that which is freely available on their open service.
Stay far away from their terrible and unethical service.