i have da/zdz and mvvs - my Da150 is a marvel - my Da50 works well but the time and cost of sending back and forth is frustrating - my zdz50 has run just as well as my da without any problems and my mvvs58 looks to beat them both!! this said i believe Da to be a real standup company and to hang in with all our crap takes some doing - will i buy more DA - YES SIR