Share 'Rapco Terminator Ventsaw Chains?'

What can you tell me about the Rapco Terminator Chain? I am not familiar with this style of chain. Is it durable? Is it quick? Can you feel the resistance in a rafter versus in the decking? Does it stretch? I have used the Raptor and the Bullet chains before. I love the performance of both but for the price, the Raptor seems to hold up a little better.