got oldschool style XC bars with 100mm stemlength and 600mm barwidth. But i will change to 120mm soon. Works just fine, but mine had two holes on the backside for a garmin mount or sth, so if you want to flip the whole thing, you have to cover up the holes(did it with carbon vinyl wrap). It had the same sweep and angle like you described, so not really all that good for uphill. Im used to slammed -17° stems on my roadbike, so it feels very unefficient and strange if i use it for steep climbs. But held up quite well so far, no creeks, no cracks and still probably lighter than handlebar and stema combinations. Also the middle is aero shaped ^^