I have never used a detector that makes a constant noise and I have been told these do. But once you learn the different tones you will love it. I have used Garretts, Fishers and Tesoro's but never a Minelab. Does it take long to learn how to use it? I hunt several times a week so useing the machine will not be a problem. Is the depth better than other machines? Also I mainly CW relic hunt so will it do well looking for lead and brass? Thanks for any info...d2