Stayed here for two nights last month. Was upgraded to a King High Floor Runway View room from a basic King Room, the upgrade appeared on my app the early morning of my arrival. Paid about £150 for two nights. Free late checkout until 2pm, overheard someone else being quoted £40 to extend to 6pm.
Food in the restaurant was very average. I wouldn't usually pay such high prices for such low quality, but I had an offer on my Amex for £50 statement credit on a £200 Hilton spend. Breakfast was better than dinner.
I made a short video of the hotel, otherwise there are some pictures below also!

View from room 1310
Falafel:
£1.50 microwave curry sold for £16:
Any questions feel free to ask.