Actually the reps are as nasty or worse in person than over the phone / email.
Problems I have had with mine..
Depth not displayed correctly - (3 - 5 feet off)
You get 10 hours of diving on one set of batteries (new batteries cost $10)
I have got to the dive site several times and the damn thing would not turn on.
Loses time while diving. (not like a second but minutes...)
Sitting in my desk, I turned it on and checked the status, it showed the temp as 130F...
Does not keep proper time in storage. In a couple of weeks it lost 2 hours....
About any patch you do will require you to enter the PIN in it all over again..
They do "patches", but requires you to have the optical PC interface to do it. (So be prepared to send to to a dealer or back to canada or spend more money on the interface)
Talking to the rep, they do not test / QA the patches they put out before release... (in engineering we call this "throw against the wall see if it sticks")
If you have an old unit, they will charge you $99 to install the option to give you almost acceptable battery life..
Don't trust your life or waste your money on a Liquivision..