I had a bad experience with Meade Plossl eyepieces (20mm in particular, made for ETX).
If focused in centre, the edges were totally blurred... and vice versa.
My old Huygens 20mm (from Zeiss binocular) performed better and does not show this problem at all.
Other, higher power Plossls from the same series (and 2x Barlow) are reasonably OK (for the money).