As a drummer, I have to say that this thing is saving my back big time!
I can put the whole drumset on it as well as my friend's keyboard, speaker, and other necessary gear for a gig. It takes up some space in a car, but it's not the end of the world. It's also very strong and it doesn't really matter if there's a bad terrain, as the wheels are quite large and wide.
All in all, I can say, that this wagon was a great investment for me and I would definitely recommend it to other 'gigging' musicians!