This is new to me,and Tor has a good reputation as an anonymous browser and they are very successful compare to some vpn company,like to try their wallet instead of using bitcoin mixer for untraceable transactions ,but I'm not going to use this as main wallet of course.
There seems to be some confusion here... Tor is not a company, i'm pretty sure the developers of the tor browser have little or nothing to do with tor wallet.
Eventough using the onion router to access the Tor network might be a good thing for extra anonimity, using an online wallet in the darkweb might not be such a good idear (IMHO)... There are a lot safer ways to get some extra anonimity (again, IMHO).