I have been using e-tracts for about 5 years. I find it best to use them and not argue with anyone on QC, cost etc. Its like a subject for some reason of politics.
I have luck up to 15 lbs , and my planes are not $2000, buy many close at $1200 to $1500.
I find much of the USA brands made in the USA have a lot of urban legend behind them when it comes to the reliability in electric. Again not speaking about Sierra, I have that gear in air power and its second to none.
When it comes to electric its getting more and more difficult to get the cheaper retracts because as soon as they come in stock they sell out.
I think supply and demand is a telling sign of performance over the long haul