If you want a dedicated sat-nav, then the Garmin wins hands down in terms of ease of use and long term support. They are one of the leading providers of GPS systems. AROVA on the other hand, is a new company selling generic Chinese clone GPS units , the danger there is they will drop support at any point or indeed, disappear leaving you with a unit that will not be updated.
In life, it's not who you know that's important, it's how your wife found out.