I've also read many posts of people saying they had an up and down rollercoaster ride on sust due to the mix of long and short esters. I suppose everyone is different. You'll also read of people who had really low levels at week 7 on nebido, it's supposed to last up to 14 weeks.
"People sleep peaceably in their beds at night only because rough men stand ready to do violence on their behalf.
" - George Orwell