I don't have a high level of comfort with Celebrity Authentics. The same people owned Gridiron Sports, which sold a lot of forgeries from what I've heard.
There were concerns wish some of their Star Wars autographs. Pete Chuka discussed them, especially Ford in his fantastic Harrison Ford discussion:
That's well over priced for a Uma Thurman signature, plus its a cheap made replica sword to under 50$ US, maybe less.
I don't think Celebrity Authentics are as bad as people say. Didn't Harrison Ford guys show him some items from the signing with them and he said he did sign them. The prices are very high for what they are.
If problems with the items was always coming up with this company, you would think the Celebrity's would not sign for them. So can't be that bad as they are still getting high end Celebrity's to sign with them.
In the past with the other company name did have some issues with items from what was said.