The worst company I have ever dealt with, thieves and liars.
NEVER EVER order anything with amazon prime next day delivery. I have waited an entire week for some Christmas presents which I ordered on Saturday. First they were meant to arrive on Monday, then Tuesday, then Wednesday, it is now Thursday and these items are still not here. Amazon has refunded me but this company still has the books and I wasted a lot of my life waiting at home. Amazon do use some other more reliable couriers, though it turns out the choice of courier for a delivery is random... So more likely than not you'll end up with HDNL, pay extra for prime and get the items a lot later than with the free royal mail service (if ever?!). I for one am not going to use Amazon prime anymore until Amazon gets rid of this terrible service. Check out these reviews for more information.