I upgraded my EA70 XC 685mm handlebar to this after a month or so riding my SB66C! This is the older version 711mm, the new version is 740mm and 750mm for the 35 version.
The carbon bars feels much easier on your hands and I get a much better feel of the trail I'm riding but at the same time it's not hard on your hands and I can ride longer, harder and I won't be as sore as I would on my original alloy version.
I'm short and don't have much reach at 5'5" and regular sized arms for my height, so the 711mm is a good width but definitely not wide enough for a faster/quicker all mountain/enduro type of riding if you are a bigger person!
With all that said, it was a great upgrade and worthy upgrade, like I said much better riding feel compared to alloy! Only 4 stars because I wish it was wider since you can always make it smaller if you need to!