I played with one for 2 weeks. All I can say is -- "decent". There is nothing wrong with it. I am detecting no flaws and no issues. Nothing outstanding either.
I am not the best guy to comment, as I ordinarily do not play with oversize racquets. The only oversize racquets I have are the old dunlop revelations, and one Vantage 100. Donnay is better than all of those -- more maneuverable and better power. Not tiring.
I also tried Boris Becker V1 some time ago, which was 102". Donnay is better. More feel at impact, and much whippier and faster through the air.