Yeah, my Alu Cab walls attach to the awning with velcro, but the different sections of walls zipper together in the corners - at the poles. That plus the velcro loops provided to secure the walls to the poles make for a stout setup - provided that your awning poles are secured with the tie downs and well staked. I'm wondering, though, about the longevity of velcro with the exposure to everyday camping dirt and grime. I was reading in another thread here on EP about a JB RTT that used velcro to secure the bottom of the access door. It wouldn't stay shut in a windy rain storm and allowed some water intrusion. But, over time zippers can break and need to be cleaned and lubed periodically or they will fail. I'd like to read an in depth study comparing zippers to velcro - it would be interesting.