I *LOVE* mine and although I still ride "English" in it (yes, post), I don't think I'll ever go back to an English saddle.
Hate the horn, but I hate all horns. Just ripped my BRAND new winter riding tights on it. Horse unexpectledly jumped a stream last wk and my shirt caught on it as well. My 8yr old loves the horn...I'm thinking of sawing it off lol.
It's an adjustment in seat from a regular English, but it's so, so comfortable and you feel so secure with the poleys - you're not going anywhere! I ride mostly trails these days, with my stirrups a little longer but not Western or Aussie position.
I have serious back and hip problems and I absolutely wouldn't be able to ride (as LONG and as well) as I can in this saddle. It feels tall, and the high cantle is a lot to swing over, but it also definitely supports my back as I ride.
Buying Aussie was an experiment that changed my riding life. Don't think I'll ever go back to regular English.