I played there three years ago. Absolutely zero fun to play those greens. Single worst course, by far, of the bunch we played in Scotland and Ireland. In order of favorite to least, all things considered with a quick overall "rating" for each that we played:
Old Course - 10 - I was shocked by how much I loved it. Was expecting a let down. Was expecting it to be in mediocre shape. I was wrong on both counts. Just a fantastic, quirky, funky, awesome golf course that I will never forget. Perfect conditions helped. 65(?) degrees. 10 - 15 mph winds. GREAT shape.
Kingsbarns - 9 - I know, I know: Too "Americanized." But for this American, it was like playing Pebble or Spyglass, but with firmer, faster conditions. Very, very playable and "scoreable" from 7000.
Waterville - 9 - Loved the scale and the ability to see my shots move. Like Kingsbarns, a big course that was very "gettable" if you hit the ball well.
Carnoustie - 8 - Jetlagged. Played horribly. Still loved the course and want another go!)
Tralee - 8 - Much better than I had heard. Played with Arthur Spring. What a gentleman he was. Comped us at Ballybunion the next day. Thanks you Arthur! Rest in Peace, friend!
Ballybunion (Old) - 8 - Too many backwards walks from green to tee for me to rate it higher.
Dooks - 8 - An absolute delight for the $$$
Jubilee - 8 - Pleasantly surprised and loved the "tightness." Never felt "too tight," but "juuuussst right." Wind was 10 to 20 when we played, so not horrible.
Lahinch - 7 - course had been "overseeded" in preparation for the Irish Amateur(?) and played slow and wettish. Would love to play again when it was firm and fast, as I'm sure it would rise in my estimation.
Castle - 3 - Truly awful golf experience for our entire group. Hated the course. As a "member's course," maybe it has some value where you could learn how to play certain green complexes, but as a "tourist course"? Just awful.