I briefly played a Glasser carbon fiber bow today while picking up my bass, and I thought it was rather nice- of course I'm not that experienced with a bow, so take that for what it's worth.
When I got home, I found waiting for me an inexpensive carbon fiber bow I ordered from Shar music. I'd noticed a lot of places offering what appeared to be basically the same bow, and ordered Shar's- which they call a "Presto". The name is simply painted on the side. I ordered from Shar as they're only 45 miles from me, so I figured I'd have it in a day or so. Nope. I ordered it on a Monday, and they didn't ship until Thursday.
Comparing the bow to my BobG German bow (the prices were the same), the Shar is significantly heavier, though not having access to an appropriate scale, I can't say for sure how much. The fittings aren't quite as nice as the BobG bow, either. And the Shar doesn't seem as responsive. I can pull a much fuller sound with teh BobG bow.
Comparing the Shar to my Glasser, the Shar defintely felt far more tip heavy- and the sounds were pretty similar, too. The Shar felkt a little livlier, but not enough to justify a price 2x or 3x as high.
The BobG bow is still the winner in the $150 category. And the cheap Chinese carbon bows- so far- don't measure up.
(One relatively cheap synthetic I do like is the Glasser "composite", but I gave mine to my nephew, who is very fond of it. His teacher likes it, too.)