Recently acquired a W.O binoviewer complete set, that comes with the W.O 20mm Plössl's, which, bluntly, are utter crap.
Would it be wise to keep these with the binos should I end up selling the set (when I upgrade to Zeiss/Televue), or give them away to neophyte astronomers in a random act of kindness (well, not that kind considering how gad-awful they are - like looking through a cheap plastic lensed achromat!)
I have 2 good pairs currently - Parks GS 25mm and Tak LE7.5, and working on a 10mm set and a 3.8mm set. The W.O's are essentially useless.