Some things that stand out to me:
The FB group for this product ("Reptile Tent's") is a private group. That's a little strange for a product page.
I would not trust velcro to hold a reptile. Enclosure security is no place to skimp. Just one high profile escape by a snake in a velcro tent would not be good for the already poor public perception of herp keepers.
Based on this video, the tents have a steel tube framework that is inside the tent. Steel rusts, for many herps and in many reptile rooms. Also, disinfecting that tubing would be much more challenging than disinfecting a sealed PVC enclosure.
Based on that video, the tent part simply fits around the tube framework (as opposed to, say, being sleeved). This presents an unacceptable risk of an animal getting trapped between the tubes and the tent (I have a few experiences with herps getting themselves stuck in poorly thought out caging details). For me, that's simply a 100% dealbreaker.
Flexible vinyl sheet is much more of a heath risk than PVC, as it contains large amounts of plasticizers that include heavy metals (lead, cadmium) and phthalates (rigid PVC contains no plasticizers). These tents look to be made overseas, and I very much doubt that this is a regulated product (as is, say, children's toys).
In my opinion, we need to raise the bar for keeping herps, not lower it.