I bought this & the volume version from ebay. They definitely hold curl. I tried it with Kanebo Kate primer and without and they both held the curl very well. I have short, sparse Asian lashes and all mascaras make my lashes drop no matter how well I curl them before unless I use the Shiseido or Kanebo primer.
Now, this hold curl extremely well, but it doesn't really coat the lashes thickly. The curved brush is good, it's short so it is easy to get all of the lashes, but the coating is very thin and you can't really layer it because it dries brittle.
I will use this one until gone as a base for other mascaras for the curl, but by itself, its not making my lashes lush enough.