We just started towing in May and purchased the Blue Ox Patirot II unit.
No issues thus far, easy set up and works just fine.
That said we are towing a 2013 Honda Fit behind a 30' Class C Ford E450 chassis, so the braking system is being taxed very much at all... For us it was just another layer of safety (and as you know, some states require the supplemental braking system).
There are many very dependable systems out there- the Blue Ox worked best for us due to the shape of the floor pan- it doesn't hit the seat adjuster and accidentally/inadvertently move the seat ( which disables the braking system).
Keith
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