This looks pretty good to me. First, it appears to be opt-in:
> Giving consent by checking the appropriate box below means that you agree to let 23andMe researchers use your Genetic & Self-Reported Information for 23andMe Research, as described above.
And they have a reasonable policy if you decide you want to opt out:
> At any time, you may choose to change your consent status to either take part in 23andMe Research or to withdraw all or some of your Genetic & Self-Reported Information from 23andMe Research. Your consent status is located in the 23andMe "Settings" page. ...
Choosing not to give consent or withdrawing from 23andMe Research will not affect your access to your Genetic Information or to the Personal Genome Service.
> Giving consent by checking the appropriate box below means that you agree to let 23andMe researchers use your Genetic & Self-Reported Information for 23andMe Research, as described above.
And they have a reasonable policy if you decide you want to opt out:
> At any time, you may choose to change your consent status to either take part in 23andMe Research or to withdraw all or some of your Genetic & Self-Reported Information from 23andMe Research. Your consent status is located in the 23andMe "Settings" page. ...
Choosing not to give consent or withdrawing from 23andMe Research will not affect your access to your Genetic Information or to the Personal Genome Service.