The near underground station is Kensal green, which is on the Bakerloo line.
And I highly recommend you to use Heathrow express, which arrives in Paddington station on Bakerloo line. It will save your time.
The room is spacious and clean. And the best thing is the bathroom is sooo clean. I loved it.
Kate was always willing to help me, and two cats are cute (even though I'm not interested in cat). I had a few minutes in my room with a cat. It seems the cat was saying to me, like 'Hug me hooman or you can't sleep on this bed'. He/she was so cute =D