Bought a tube of E6000 since the label says it the same chemicals as Shoe Goo at 1/2 the price. The consistency is thinner so depending on how you apply it on your shoe it could be easier or hard to do.
Took almost 2x as long to harden, I used to apply Shoe Goo the night before a morning session and I'd be good to go. Had to leave the E6000 on for at least 24 hours before it was hard and didn't flex on the touch.
Grip wise it's a little less grippy than Shoe Goo, not always a bad thing since Shoe Goo can be overly grippy for the first hour of the session before it gets smoothed out.
Durability is around the same as Shoe Goo.
Overall a decent replacement if you can't find Shoe Goo, but I'd stick with the original stuff.