Not bad but caution.

A common fact for dry air bombs without otherwise is that they should head up and maintained beings is the pipe that supplied is twisted to direct to the area to clean. By putting the head down or sideways of the liquid is sprayed along the air which is not good for electronics.
The failure of this bomb is that happens to be unreliable and spray water even head up, either in normal use. It earned him his star less.
Otherwise its advantage is its quantity / price ratio.
Use with notice.
If you want reliability and no nasty surprises you turn to a bomb that can be used upside down.