First off, this tour cost $1 to download online, so there is very little one can complain about for that rate. It's a steal.
I'm a local, but there is a lot in CHinatown which which I am unfamiliar, and decided to do some exploring. The walk does take you down some side streets, point out some buildings, etc, that you may not have noticed in the past. The highlight for me was ending in a Buddhist temple. I have never been in one before, and would not have known I was permitted to enter this without the prompting of the tour guide.
There were two "errors" on the tour. One the guide instructs a left-hand turn, but both the map and geography make it clear that you need to turn right. Second, there is point where you are guided through a metal gate into a community center. Either the gate is no longer open/used or it is not open every day (I did this on a Saturday), because access was locked when I got there.
In terms of the audio itself, I found the background "ambiance" music and sound effects distracting. I prefer to hear the organic and real sounds of the street than having music trying to overpower them. Many of the streets of the tour are already a cacophony of sound unto themselves, and adding sounds in the audio to that is too much. Additionally, at a few points, the narrator was melodramatic to the point of hilarity.
I certainly cannot use those points to recommend against the tour, again because it costs only $1. Go for it and see what you think. read more