Pro: Euston/Kings Cross is a good location, lots of public transport. Many small restaurants nearby (mostly Indian food). The room was OK. The room had its own lock with code pad, so safe and private. Also code pad on main entrance lets us come and leave anytime. There were two bathrooms (w toilets), one toilet and one kitchen shared with other guests.
Cons: when researching options for the trip we saw comparable prices for staying at hotels with breakfast included. One of the reasons we chose this place to stay was the advertised "breakfast" - which turned out to be only muesli and milk available for self-service.
The room was described as "quadruple". It's not that big IMO.
So, OK place to stay but not great value for money compared to our expectations and the competition.