I have one. I'm not mad about it to be honest but it was the only saddle I could find to fit my horse who has huge shoulders. It's OK with my Heather Moffatt seat saver.
I had an Ideal GP for my previous horse and it was the most comfortable saddle I've ever ridden on. I sold it to someone I know and they love it too.
My Albion K2 GP was the most comfortable and secure saddle I have ever ridden in. Wasn't great for jumping in as it has a high cantle and that often slapped me on the butt over jumps, making an embarrassing noise , but that may have been a function of the size of my posterior and the naff jumping position that I have.