After skating in the Griffins for two weeks now, I must retract my previous statement about their lack of stability. As for the thickness of the sole, it eases up a lot over a period of time. The sole is able to flex while still remaining stable - it's incredible responsive. Additionally, they're prime for low to medium impact.
After giving the shoe a proper break in and giving them a real chance (probably two or three times after skating them) they started to soften up and the midsole molded to my foot. What I'm most impressed about is that they retain their shape very well. This is NOT a vulc that's going to get floppy (neither the sole nor the upper has gotten floppy).
I've noticed that after breaking in most vulcs, the upper tends to give out and the suede sags over the outsole ---- this has not even started to happen yet.
The shoe is good to go with the stock insoles due to the crated midsole. Even though the outsole is rather thick with higher sidewalls, the toe is incredible for flip tricks after the sole is worn down a bit. Also, I wasn't expecting much with the grip, but there are not any signs of an areas wearing down as of yet.
Honestly, this is my favorite vulc shoe right now.
Only gripe? -lack of breathability. But, it's spring, so I'm not too bugged.