Thanks to all who have replied. I'm grateful for the responses.
The number of respondants who commented on either the green fee, seemingly poor treatment from staff, preference for neighbouring courses, or a sense of unwelcome at Troon, is not what I expected.
Certainly not what I thought GCA members would focus on when asked to comment on the merits of a course, let alone an Open rota course. There seemed only a modest number of posts which gave quality critical comment of the course, other than "the last 6 or so are a hard slog into the wind".
I understand the dislike for a round of 2 halves, with a simple and often easy start through the first half dozen. Especially when it contrasts with a tougher back 9. Not a theme I'd like to see repeated frequently, but at Troon, I think it works.
I like the stretch of 6 through 13. A mix of holes which are well-sited, not over-done, and all demand something different of the golfer. 6 is begging to be birdied. 8 is an architectural jem. What's not to love with 8? As Kevin stated, the land through that middle third of the course moves well. The approach to 10 is a great shot. There's a challenge with the drive and approach at 11. I can still feel the sense of unease and disorrientation on the tee at 13, with the wind picking up. Do others experience that or is it just me? I also liked 17. For a course with some strengths, I'm surprised it isn't appreciated a little more.
MM