Advantages:
Functionality: it works as intended. Switching between A or B input is flawless.
Build quality: rather solid, but I'm not gonna take it outside my studio, so I can't tell how good it will be on the stage and tour.
It doesn't need a battery! This is really cool. Without a battery, light is not working (obviously), but it's only for 2 inputs/outputs, so it's easy to remember what is plugged where.
Disadvantages:
The battery cover is very loose. It feels like it may fall off at any moment.
It may sit upside down, depending on how it's used. In my case, it's the first pedal merging two inputs to the rest of the pedal chain. So it's upside down. Obviously, nothing can be done in that matter, as it's just how it is in the case of this type of pedal signal splitter.