My wife bought the Wilson II as my Christmas gift, and I have nothing but issues. Typically clogs in the nozzle. I have 9 spools of filament and after testing five different spools,all would clog the nozzle.
Skipping to the resolution - bake your bad PLA filament at 160 degrees F from 4 to 6 hours and see if it stops clogging the nozzle.
I just purchased Simplify3D, and that was the next best decision ... I don't have problems - I just need need more time in the week to print!
If you're considering a 3D printer, the Wilson is a great choice.