Well, I have waded through one disk of Series 1 but was not able to avoid dozing off a number of times. Does this suggest boredom? It does. To suggest, even remotely, that any of the central characters are actually "rivals" of Sherlock Holmes presents irony in rhetoric. The title stands to convey to the viewer an incongruity used as a tool of humor in order to deprecate or ridicule an idea or course of action. Not so. Sir Arthur's gem knows no equal and certainly this motley collection of so called sleuths do not even come close. So much for the title.
Although brimming with talented actors, hamming it up seems to be the order of the day. The actual solving of crimes, although liberally laced with old school tie dialogue, is limited. It results in comedy characterized by broad satire and improbable situations. Perhaps this was the intention.