I recently built 4 like that. Such a pain. Especially when you realize you forgot to pass through the spacer thing between the frame and the bars, and have to re-do it Depending on the order of the cables exiting the stem and entering the frame, it can mess up the balance of things. If it's centered, I guess it's good. I have no issues turning the bars 90 degrees or more when the bike goes in the car, for eg, and the routing has not negatively impacted handling for me.
My next builds will be w eR9, looking forward to routing 2 housings and not 4...
Yeah, it looks great, but now I know why I ordered my TFSA frame without the all internal cabling...
And it looks like the upper bearing is also not really sealed from the elements because there is a tiny gap (barely visible though) between the headset cover and the frame. On the TFSA frame there is a rubber seal between that cover and the frame. I guess this is standard with these fancy headset covers but it does not help to keep the water off the upper bearing. I can't imagine the hell I must go through to replace that bearing in the future
I also like to use a lot of grease on the headset bearings when installing. I put a lot of grease everywhere before routing the cables, so after wrestling for a couple of minutes with all the cables/ fork/frame/handlebar everything was full of grease. Should have kept the grease for the end...
And the handlebar is more or less centred and I can move it freely from left to right. It only just does not fall to one side when you tilt the frame like it does on my other (non fully integrated) frames.