We had a great stay, fantastic value for money. Would highly recommend. The tube runs under the house but is not loud and did not impact our sleep, it’s not really noticeable after the first hour or so.
It’s walking distance to Kings Cross tube station however parking is a bit inconvenient but you expect that being so close to the centre of London. In the end we found an RCP car park which costs £18 for 24 hours which was a 15 min walk away from the accommodation.