Great post guys enjoying it.
Warranty, Garmin Aus recently replaced my unit 1390 cause sound kept dropping out on start up I later found out it was a software issue that they should have known about, it was 5 updates behind. The new one did the same till I updated it. But It was free and sounds as it does above.
Languages, have to be similiar to the one you are replacing to work properly I recently visited the states and even though American is close to Australian common problems were Pronounciation such as in Aus take the one hundred and 5 in USA take the 105. As well as rds, cres, st we have circuits (Cr) Avenues (Av) when I run American voice in Aus it will say Cr or Av Instead of circiuts or avenues theres a few other differences I noticed aswell. When I did mess with voices they jumbled the order of things Thats why most voices say to replace American. Simple solution in Aus is if you like the Male voice then replace the Female or vice versa but my gps only has Female voice for American. My Wife hates it.
Any help wanted with Aussie files drop me a line and I will do my best to help

Paul