When I posted these in the Chat forum they stirred a bit of interest, so now that I have them mounted and some miles on them, I thought I'd post a bit of a review here. As I said in that thread, save the flames-yes, they are made in China by an unknown source. If they came from some boutique in Europe everyone would be gaga.
They do appear to be identical in form (and weight) to the first gen bars supplied with the top end Emonda, and available from Bontrager at $600. The Bontrager Blendr mount fits perfectly to the front of the bar.
1) They are 100g lighter than a very light stem ( I was using a Kalloy Uno) and reasonably light carbon bars
2) They are STIFF-there is a large web at the "stem"/bar junction that likely adds to this. There is a perceptible extra tiny bit of firmness to the front of the bike.
3)they appear to be well made and finished.
4) The position as delivered was identical to my prior setup-6 degree stem, same compact reach, drop etc-obviously ymmv, but I was very pleased as its fixed.
5) I've hammered them over rough pavement etc, and no creaks, flex etc. I don't think they're poorly made. I'm under 60 kg, so take that for what its worth.
6) They are available without graphics of any kind if you look around ali or dhgate.
1) They are STIFF- there is a subtle but perceptible increase in road buzz etc transmitted.
2) The interface between stem and steerer is tight-might have been a qc issue or a sample size of 1 thing, but mine required a bit of effort to seat-and if you used an expander like a tune gum gum it might be less than ideal.
3) They are round and the size of classic bars-no issue for me, so far, but I've grown accustomed to flat tops and aero shapes-these are less comfortable to lay wrists beside stem, if you do that, and have a little less support for the wrist area when lying flat on the hoods. The drops are nicely shaped though. Also, its worth noting that the cable routing is purely external and there are no grooves. Mine worked fine with a brake cable and di2 wire.
A couple of other notes. The stack height is almost exactly one spacer larger than my UNO-this may or may not cause issues in your installation. The clamp hardware is steel 5mm -I replaced the bolts with ti, the nuts are bonded. You'll need to use the blendr mount for a computer, as there doesn't appear to be another easy solution, except for a kedge style cap mount. There does appear to be an internal obstruction in the shifter clamp area for those thinking of using a new barplug type junction for di2, and I'm not sure I'd want to drill the bar for the cabling anyway.
Overall, if you can live with round bars with a compact drop, and are ok with something stiff, these appear to be a very cost effective way to save an easy 100g over traditional bars/stem.