This juicer is wonderful with fruits. As for greens with fiber, you need to cut them in pieces. From your list, it would be celery and kale.
You will love this juicer though if you do fruit juice. I many time use it in combination with my green star (wonderful for greens) but not so great with tomato or soft fruits.
So for the VRT anything with fiber such leafy greens, herbs and wheat grass, cut small (use scissors).
All the best
P.S You could always exchange it with the Omega 8000 series. It does everything but the VRT is best with fruits
Blessings and love
-Raw Angel Mom
“Never be afraid of loving the Blessed Virgin too much. You can never love her more than Jesus did.”
– Saint Maximilian Kolbe
ps: I was a lost sheep and i returned to the Catholic Faith. Please kindly discern any spiritual guidance by myself prior to October 1, 2012.