i have been a plantronics user for 13 years always with excellent impressions. unfortunately this is the first product that disappoints me because of construction quality issues.    the previous one i had was the excellent m500 which i had to retire after of 2 years of intense use with its battery weakened.     i bought the m110 and i am having problems with the construction. the earbud (the entire earbud with the speaker in it comes off in normal use and hangs from two wires. i am thinking to glue it with super-glue until it dies. unfortunately the problem appeared after the 1 month.    my advice: buy the older m500 if you can still find it.