I've no experience with them but would tell you anyway, I would have nothing to do with them if I wanted a Maltese. Also, just bc movie stars get puppies from a place certainly doesn't make the breeder reputable. I remember not long ago Miley Cyrus got a yorkie from one of the worst puppymills in my area. Also, don't buy that line AKC costs more to register, that's why they register with the other so-called registries. Reputable breeders don't use those registries.
If you want a Maltese contact their breeder's club. Specific breed clubs are always the best place to start your search.
American Maltese Association