Celestron 20mm erect image eyepiece. Are they any good

Help support our channel The Celestron 20mm erect image eyepiece comes as standard with a number of the Celestron Newtonian type telescopes. Gives an upright image for terrestrial observations, but creates a few issues that are not ideal for astronomy. Have you used this eyepiece yourself. Let us all know your findings in the comments below. Did you stick with it, or upgrade.