There are two main types of material on the audiotour. For the most part it consists of abridged audio versions of the stories from the book. The voice-acting is good and the concept of walking around the locations while hearing the corresponding stories works well, although unavoidably the length of each story and the time it takes to walk the real-world setting do not always match. Just keep walking and don't let it bother you, I'd suggest.
The headphones do a good job of insulating the listener from the noise of the 21st century city, creating a strange sensation of not really being in the modern-day city. As someone living in Dublin I found the tour interesting as an insight into the city a century ago; to see which areas are still run down (many of them) and which have changed (a few, not always for the better). Helpfully, as well as stories and directions the audio also provides 'extras' - comments on Dublin and Joyce.
I won't list all of the locations here - you get the idea. Farrington's is of course included, and if you're so inclined I'd suggest having a glass or two and enjoying the place. The map of the tour also suggests afternoon tea in the Gresham, the final location of the tour, and while that's not my own 'cup of tea' it might well be a good way to end the tour.
I have to admit to having temporarily lost momentum when I first started reading Dubliners, but the audiotour - particularly the superb Counterparts - got me interested once again. The audioguide is a quality piece of work, and a real addition to the city's Joycean scene. Both as a way to see Dublin with fresh eyes and as an enjoyable recounting of the stories from Dubliners, this is a winner.
There are two versions of the tour, one taking about 3-4 hours and the other taking about 7 hours. The shorter version costs €12 while the full day epic costs €19. Overall I'd consider those prices reasonable given the quality of the material and the time the tour will take. Full details are available on Wonderland Theatre's website.