Yes, DAT Genius is very helpful. Just like Bootcamp, its supposed harder then the actual DAT and to be used as a learning tool, so I wouldn't worry about that. Genius has particularly good sciences, pat, and reading comp, although I found their qr to be too hard.
If you have over two weeks, and you've finished bootcamp, you definitely should get it. Its less then $100 bucks and its helpful practice and additional concepts. You can also look into DAT QVault for more practice tests