I was asked via PM about EWO vs Ion, since I have both. Thought I'd share my reply publicly.
Did a few climbs in the yard this morning (10 feet). A few thoughts on it, from a novice.
1) Does not bite into the tree as well.
2) Have not figured how to tidy everything up at the end as well, it's a bit sloppy packed up.
3) The top platform definitely will bruise some shins along the way.
4) Because of preventing bruised shins, my instinct was to do a side leg wrap up and down the tree. I know that can lead to kickouts. I'll have to go into woods to do some 20 foot climbs and see if it gets to be second nature.
I do like it, but currently as of today, if I was grabbing between the two, I'd grab the EWO. I will do more climbs before I give up on it. And of course, because of availabilty and vendor participation on the site and in our meet-ups, I would always recommend EWO first. On the five climbs I've done in the yard, there is nothing about it that was vastly superior to the EWO, IMHO.