@jumia Yes, I did do the re-terminating myself. Before I continue, in all fairness, the term "el cheapo" I used to describe the cord ends that Transparent uses was a poor choice of words. Their cord ends are not poor quality products. It's that on my scale basic brass is the baseline and just as with many other kinds of products it is possible to get higher performance or a different final result at additional cost.
Re: how big of a deal is it to change the cord ends? Well, depending on your manual dexterity, level of patience and how left brained you are it can be done. Don't forget you are ultimately dealing with electricity. Your comfort level about making changes to an electrical device and any ramifications that could arise from any mishap that might impact your home owners insurance should be taken into account.
Re: the Power Isolators, I can remark about the mm and mm2 generations. Based on my observations I think that they used very good receptacles in those units. They are labeled as Hubbell brand which is a major player in their arena. I suspect that Transparent has the buying power to contract with Hubbell to have the receptacles made to Transparent's specs. or at least they can choose what options they want. The receptacles seem to be made with high copper content internal conductors. I have full confidence in the Power Isolators. Yes, they are heavy. A peek inside reveals that all of the electronics inside are potted, which is where some of the weight comes from.