Hi Strake,
1. 9hrs 45mins is a very long trip to JFK - hardly time saving.
It is a long sector granted but the ease of access to LCY for the City boys and a 15 min check in goes a long way to remedy that for total time taken.
2. There is restricted availability
That's because the bank which requested BA provide the service is the primary customer and has block booked many of the seats. Any further seats sold will make an extra tidy profit.
3. It's pretty expensive
Compared to what, there is no comparable service that'll take you from the heart of London to JFK. Comparing it with a Club cabin from LHR most definately is not comparing like with like.
Sorry if I sound a little biased but I think it's a great idea for once and wish this route all the best.
