DO NOT USE THIS SITE
I booked two taxis and called the firm they had quoted me the unbelievable prices for, and that's just what they were - unbelievable! The taxi firm were completely unaware of this site and were shocked that it had provided me with their details! It's an absolute scam! I'm lucky I selected 'pay cash on pick up' I can imagine a lot of people would pay online.
This site needs to be shut down!