I have been using this hotel for nine years now to attend trade shows, booking 5 rooms at a time for 2 nights. Great staff, excellent value for money, good food, and excellent location......but if the weather is warm you will NOT get any sleep.
Unlike the lovely cool bar the air-con in the rooms is complete rubbish. A faint warm draught leaks out from the vent and the controls on the wall simply control the noise level. The windows have a safety system that only allows them to open one single centimetre (I am NOT exaggerating). This is wide enough to let in the noise of traffic, planes and trains, but not a breath of air. You constantly wake up sticky and uncomfortable throughout the night.
I have commented on this annually and nothing has ever been done. It is increasingly unlikely I will book again.