Sloppiness.
The outline of the story had me feeling very enthusiastic when I sat down to watch the DVD. And I enjoyed the comedy of Wells' fumbling attempts to make his way in twentieth century San Francisco.
However, I was disappointed by what I thought was sloppiness in the story and a lack of research.
For example, in "Time After Time", the first of the Ripper's murders takes place in London in 1893, and every time the Ripper goes to murder someone, a musical watch plays a few bars of music. The music is quite recognisably a melody from J.Canteloube's "Songs Of The Auvergne" (not credited, though). Canteloube put together his collection of "Songs" between 1923 and 1955; so finding his work playing from a musical pocket watch at a time when Canteloube himself would have been thirteen or fourteen years old caused some surprise.
And another example. Late in the film, Wells takes Amy, the friendly bank employee, for a short trip in the time machine. Amy gets out into the future, just a few days ahead, and finds a newspaper that has a report of her murder. Next, while Wells is detained by the police over the time of Amy's murder, and considerable tension is built up by repeatedly cutting from the anguished Wells begging the police to check the flat to a terrified Amy trembling in the flat, a murder is committed in Amy's flat, but it turns out to have been of her unlucky work-mate who visited at an unfortunate moment while Amy was hiding from the Ripper in a cupboard.