I use FreeJump on my jump saddle and Tech Venice on my dressage saddle. In USDF, they don’t allow FreeJump with the open branch stirrups, which is why I put TechVenice on my dressage saddle. In USEA, I rode with FreeJumps in all phases no problem.
I really like both but if I suddenly had my stirrups evaporate and needed to replace, I’d go with Tech brand stirrups on both. It’s weird and rare but I have had my rein loop slide into the gap on my FreeJumps. I caught it quickly the two times it happened but it was scary.
That being said, FreeJumps do really work. I had a horse spook when I was mounting and I went underneath and I got caught in my stirrup. I recall vividly feeling the stirrup bend and I slid out immediately. This was in my dressage saddle.