Since my asthma was severe I had to carry the nebulizer with me all the time, and that wasn't easy for a kid to do. It was about ten inches long, fragile, and if one of the stoppers got loose the medicine would leak out. But to me, it was worth it. When my wheezing was intense the relief the nebulizer provided seemed like a life saver, and perhaps it actually was since my asthma was so bad.
I haven't needed that contraption in decades, but I keep it in a box of sentimental things because it meant so much to me when I needed it.