I spent two nights here this past weekend, booked on 12K points/night into a Couchette room.

I arrived into King's Cross Station and could see the hotel and the GNH Bar - but you need to exit onto the sidewalk to reach the (very small) lobby and elevators.

The hotel was full - no rooms available for sale - so as a Platinum I wasn't upgraded. Travelling alone, the Couchette room was indeed small, but the bed was comfortable, the bathroom was great, and it was very quiet. If you plan on doing significant work at the desk in the room, this may not be the room for you, as there was a stool and not a chair at the desk. Wifi is free for all guests.

Malin and Goetz toiletries in compact but nice bathroom and a decent spread (cake, candies, fruit, coffee/tea) in the pantry located at the end of each floor.

At check-in, I was offered a choice of 500 points or breakfast. I chose the latter, which is a full a la carte breakfast (anything off the menu) at Plum + Spilt Milk, the hotel's restaurant. Very good quality food. There was some sort of technical issue on Sunday morning (the printer wasn't working in the kitchen, which resulted in orders being backed up by the time they realized), and I understand the hotel proactively comped breakfast to a good number of guests that morning - very good service recovery.

I wouldn't hesitate to return - Kings Cross is on six tube lines, I believe, so its easy to get all over town. Travelling with someone else, I'd probably book a larger room type, unless we didn't plan on spending a lot of time in the room.