My 55 ATA2s have been been back twice.
1) never quite got full travel out of them from new. Over a weekend in Morzine they went from not quite getting the last inch to not getting three inches. Even without air in them they just came to a dead stop. Then the travel started winding down while riding. So I’d end up down to 120mm of stanchion of which 80mm of travel wasn’t getting used. Effectively they were the very stiff, very long 63mm forks!
2) worked fine for a while. At the end of a ride nipped into a pub for a pint, came out to find about 2cm of stanchion showing.
They’ve been fixed again but it’s too early to say wherther they’re ‘fixed for now’ or ‘fixed for good’.
Damn good forks when they work.