Product review (4 stars): 30 minutes or less on an LG DLGX3471
The converter is easy to install if you follow the step by step directions, start to finish I was done in less than thirty minutes.
A 10mm combination wrench and Phillips screwdriver is all that is needed, although it will be helpful if the wrench is short - about 3" in length. For the first page of the directions I started with the dryer upright, then once I had all of the metal off I rolled it onto it's back to install the converter (second page of directions). With the dryer on it's back access to the converter was much easier and I could skip the burner cover removal step.