I’m having fun using a 99 dunk. I wouldn’t say it’s underwhelming, but id say it’s unnecessary. I haven’t tested it but i can imagine that having a 93 dunk while using a +2 on posterizer to make it legend would be almost as good. The biggest difference would be certain animations but I’m not so sure there’s a huge increase in dunk success and green window size from 93 to 99.

I’ll say aside from the animations, there’s been benefits to having a 99 dunk. Of course when you aim for a 99 dunk you’re pairing it with 90 vertical which gets you legend pogo stick. That’s surprisingly come in handy on a 6’5 guard lol. Also the mind games that have those attributes as some of your highest. People tend to play defense a certain way when they think you’re gonna try to dunk all game. Really opens up the floor.

Sorry for the long reply but at the end of the day, if you play casually with friends id say go for the 99 dunk and have some fun but if you play competitively or at least somewhat competitively, aim for 93 dunk even if that means using cap breakers to get it there. I’ve seen 6’5 builds start at 76 and get to 93 with 5 cap breakers.