Many pro players use them because of endorsement deals with Hohner.  Pro players don't use them until several hundred dollars is spent on each harmonica to make them playable at a professional level.  I have spoken to famous professional player that endorses them.  When I spoke of them performing poorly out of the box the famous pro had to go get ready for the concert and wouldn't discuss the point I made.  Buy Suzuki Promaster for best performance for the money out of the box.  After buying more than 120 harmonicas over 40 years I have some idea which are better.