The Blockbustervouchers are as follows -
4x Two for One rentals
£1 Extra Credit on game trade-ins
£1 Extra Credit On all Blu-Ray Trade-ins
£1 off any blu-ray, DVD or game rental
2x £2 off any pre-owned blu-ray or Dvd over £5
Valid until March 31st 2011
It suited me as i rent loads of films.