I also got diagnosed as an adult but though things started making sense when I went through the evaluations it has taken years of conscious thought to unravel my difficulties and even start to see what I should do and avoid doing because of it.
Personally I just can't find myself trusting a service like this unless it has strong connections to ongoing research or as part of treatment by professionals.
But I could really use a coach. I need someone to help me stick to and maintain my to-to list and/or help me write reminders but I'd really like them to really understand ADHD and be able to spot thoughts and behaviors and help me do well.
I've found some great paycholigists can do this, and I think it's very very rare among the rest of the population.