We reserves the service of Patrick Egwu Transportation to travel from Heathrow to downtown London. While making the reservation I was informed that reserving ahead for the return would provide a savings - so we did so. When we arrived at Heathrow the transportation was there waiting for us. For the return I needed to adjust the pick-up time. This was very simple to arrange through their website. For the return to the airport, the driver called when he arrived to pick us up, The van was very clean, the trip to the airport uneventful - just as it should be.
I will gladly use the service again in the future.