Roberta helped me with directions to her house, which is about an hour from St Pancras International terminal. The arrival process was relatively smooth. The room matches the description, you even have things that are not offered in other places and that is a plus. The bathroom is in very good condition, there is internet and you can store food in the refrigerator.
There is a supermarket in front and several stores around to buy what you need, I had to buy a cable for my phone. There are bus stations very close, in general you can get around quite well. The center is approximately 40 minutes away but consider more if it is your first time, while you find out where you are. In general it's a good option.