I always find premier inns are good hotels and this is one of them. It's right next to the Bakerloo line, but it's rooms are quite well insulated from the noise, so didn't find it a concern. The Bakerloo line into London is quite slow, so quicker to walk to Northwick Park on Metropolitan line only 7 mins away.
The Beefeater attached offers good food with a large menu and is good value for money. Also there is free parking although the spaces are quite tight.