Tried on a VIXEN BT81S-A bino-telescope, and compared to VIXEN's LVs (10mm and 15mm) views of the moon are crisp and clear. Eye relieve is convenient and the eye-guard very practical. These EPs seem very well made (fit and finish) and optically perform very well (though tried on a bino-telescope, magnification was only x40).
For the price... you will not find anything better.

Bought a pair of these for use with my WO binoviewer.
Once you get used to aligning yourself precisely with the exit pupil, they are a joy to use - bright, clear and sharp from edge to edge, and narrow enough to give no problems in a binoviewer.