This weekend's first St Andrews chess congress is a very well organised and enjoyable affair in a nice venue with ample parking and in easy reach for bus, train and car. In many ways it is a replica of the Gonzaga tournament except that Gonzaga is 5 rounds, not 6 and Gonzaga is FIDE rated.
My personal preference is for FIDE rated tournaments but it is not a major issue. I do however hate playing three games in a day and judging by the amount of byes people took this weekend I am not alone in my views. A five round weekender allows a later start in the mornings and a nice early finish each day. It also makes for better chess because of the more generous time controls and the less games. I am sure that arbiters, tournament organisers and the volunteers who manage the tuck shop would also welcome shorter working days. The only advantage of a 6 round event is that you get an extra game (if you can call the lottery that usually ensues on the third saturday fixture a game).
Some people will say that there is more chance of getting an outright winner over six rounds but I am not sure that that is borne out by results.
They plan on holding the St Andrews tournament every year, which is great, but I hope next year they will change to a five round event.