I was in love with that when I saw it, super sleek and not all swoopy and such. Then I found out its running two different wheel sizes. Hello 2001. If it was all 26 or even all 27.5 I would really be more into it.
I have no experience of them all, but I've seen some one using a Giant Faith as all mountain bike and pedal all the way up on the mountain road to the starting point of local trail, so i guess the pedalling efficiency is kind of good, and it's not too heavy. But y not u just keep your dj and buy a big DH, like a lot of us do