definitely ! people look at a meter and say mmm junk sometimes it is junk BUT often its not and THE SOUND TO A GOOD EAR will dig those
Sometimes i would agree but sometimes you need a meter or you would never have an idea what you are digging , beaches are a good example .
The best target i.d. machines are the Explorer / ETrac and CTX , they have the best tones and many of them , also with their meters and their screens that have many pixels act almost like a radar screen .
Where i go you would not normally use a non metered machine though many do to their cost because of all the rubbish of all types but i can see the point in digging all to find all . It just gets very boring and tiring digging pull tabs and ring pulls and bottle tops almost all the time .
Knowing your machine is the best way to find most of the goodies available .