I should report this post for attempting to incite a riot, it may not be your intent but that's the way these threads usually go.
It's starting to head that way. Obviously not meant to.
A question to ask, was this repair guy the agent for Waeco only; he may not have done Engel so therefore could not give an example of how many of theirs get repaired.
You look at the amount of both brands that are sold annually and for how long they have been available in Australia. There are a lot of bloody units available.
You should look at this in a positive light and say at least they have an extensive repair network set up.
As with all appliances, they breakdown. We are talking moving parts, gases, electronics. None of which are fool proof. Take into account these things are portable and with that are susceptible to more knocks than normal.
Mark