I've read the same reviews, and if they had used a test base the lethargy would have been addressed and the ED equally with the addition of Maca / Ashwagandha, and or a combination Test Base that included these. Note: Black Maca for men should be dosed in upwards of at least 2grams per day, so that lets out most supplements that incorporate it as an add on. That said, one of the reviewers stated he wished he had stopped cycle at 3 weeks, which is where the lethargy and ED kicked him.
The SERM is what brings you back during PCT.