Very tempting to buy the ticket because it is cheap. The only issue is that I am in Scotland.
Total waste of money. If your time or dates change in the 90 Day period, you are not covered . Better use taxi or Piccadilly line. Their monopoly on Heathrow connect ticket price between Hayes and Harlington station and Heathrow should end . They want the third runway but rob passengers by not letting them use Oyster card on Heathrow Connect.
Look at the total time and cost. Piccadilly line may be slow but the ticket covers you everywhere on the Tube network.
This is a good deal. The Picc is PAINFULLY slow if going from central LDN. And the trains are TINY with hardly any luggage space and of course all the Hounslow / West London commuters make it most uncomfortable mixed with loads of airport people with 100s of cases. This is deffo worth it from town to LHR. If you are going form Kings X take the C&H lines from Kings X Underground platform 1 towards Hammersmith, Journey to Padd is only about 12 minutes. These trains are very large, air conditioned, and have lots of space. Then transfer to the HEX to LHR ! Much much more pleasant than the slow round-the-houses stuffy packed out direct journey by Picc. Similarly if going from the West End you can get connections easy to Padd.
Do you want to change the title to show that the fare must be booked 90 days in advance? A bit misleading.