Does it's job.
2001 Mitsubishi Montero Sport
Crutchfield Customer Review (What's this?)
Does what it says it does but it's bulky and very fiddly. It has it's own gain controls built in to it and if installed behind the receiver you need to make sure you get it set correctly or else you will need to yank the head unit out to make adjustments. Lastly, it says to use the attached plastic screwdriver to attach the wires and adjust the gain. After a significant amount of frustration, I went and dug out my precision jewelers screwdriver set. The 3mm flat head makes working with this thing less stressful by a vast amount.
Pros: Does exactly what it advertises.
Cons: Very fiddly to work with and adjust. Large size makes it potentially hard to stick in the dash behind your head unit.