Just to keep it short: The Hoxton is modern, but payable. Located close to Liverpool Street Station and Moorgate Station, you can get easily to all major attractions in London. A small breakfast is included and can be brought up to the room (Banana, Orange Juice, Yoghurt) or you can have a normal breakfast downstairs for an extra charge. A restaurant is in the hotel, but havent used it. The rooms are clean and equipped with all you need. Even the bathroom is for British conditions very clean. The room size is smaller than usual, but why would you spend so much time in the hotel anyways. The people at reception are all nice, friendly and professional.
Only back point is parking. There are a few spaces at the back of the hotel and everything around has to be paid for which isnt cheap. Best to come with public transport to Liverpool Station (Bus directly from London Stansted Airport) and walk 10min.
I would go again and again.