I have reserved an Audi TT from the Hertz 'Fun Collection' over the Easter long weekend next month from Marble Arch in London. According to the website "Hertz Fun Collection cars have guaranteed make and model reservation, so you know the car you book is the one you'll be driving away in".

I am pretty keen that when I arrive at the rental station next month, there will be a TT there waiting for me. Does anyone have any experience, good or bad, of what this guarantee means in reality? Also, any tips on making sure I get the car I booked?