Stayed there recently. I booked a Premier King Room with Tub which has a bathtub in the room instead of a plastic chair. Much better, the bathtub is circular and about 1.5 meters in diameter and can comfortably fit one person.
I was given a drinks voucher as Platinum (Gold, Platinum and Spire all get a drinks voucher - gold gets house wine, platinum gets additional choice of sparkling wine, and spire gets additional choice of cocktails).
Also, it isn't very clear from the IHG booking page, but the Premier King Room with Tub comes with free breakfast at their Baba Chews restaurant and late checkout at 3pm.
Full review:
http://www.TheAlphaLion.com/review-h...oom-with-bath/