Just booked flights from their new website and I must say it was an absolute pleasure. You book your flights then a page comes up to add in all whatever extras you want then you go straight to payments, very sleek, very efficient and the booking process is over in a breeze.
I was having a problem with their scrolling forward section. Old dates mixed in with new dates. One bit was June, scroll back and it was October etc. Just make sure that you have actually booked the dates you think you have booked.