Having become an expert, in one day, at taking The Tube, I decided to take public transportation to the airport. It worked like this: Walk two blocks from hotel to Baker Street Tube station, take two v e r y l o o o o n g escalators down to the bowels of London, board the train on platform 9, disembark at Paddington, wind your way through tunnels and up escalators and along more passageways to Paddington Station proper, find platform 7, get on the train, get off the train at Heathrow Central, follow the signs to Terminal 3, which may have been a longer walk than the two blocks to the Tube. And what about paying? A flick of your watch at the stile as you enter and then exit the Tube Station. As for the Heathrow Express ticket, you can buy that on-line.
Check in for the flight was easy as was security, and the flight was just fine. Food was terrible. Landed almost an hour early! Passport control fast. (Global Entry is the best.) Bag drop fast. No customs at all. Found person who was picking me up without difficulty. Traffic from JFK light on a Sunday afternoon yet. All totally astonishing!
Best parts of the trip were the days with Alex and Alex and then with Max. Except for the HEAT at the beginning, lucky with the weather, which is a huge factor when you are walking between 12-17 miles a day. Some of the stages were beautiful, some were dull. Navigation apps worked 100%.
Most accommodations were fine; a few were standouts and a couple were "I wish I did not have to stay here." There was a mix of hotel, bed and breakfast, and AirB&B. Overall, I prefer hotels, except when they are self check-in, in which case you have the disadvantages of an AirB&B without any of the advantages (kitchen, e.g.).
Luggage transfer, all arranged ahead of time worked perfectly.
Biggest challenge: when there was not a good grocery store close by.
Offa's Dyke: harder than I thought it would be, but some stages were lovely. The downside of Off'a Dyke is that there are not always accommodations near the path. This means either complicated taxi arrangements or several miles on asphalt to get to a place to stay.
Shropshire Way: Bag the most northern stages completely. They are dull, there is too much road walking, and some have significant detours. The southern segment is quite nice. But because the Shropshire Way is not a National Trail, it is not all that popular, so the route is poorly maintained in places.
Overall, a good experience, say, B+ AND I am glad to be home!