I wear the Tech Air 7 for trackdays, but it does have a Street mode, too.
In Street mode, it will deploy if you are stationary and rear ended, provided the other vehicle is going at least 15 mph.
The TA-7 can be transported in the cargo hold provided that you disconnect the battery from the inflator module.
The manuals says to download the SDS (Safety Data Sheet) to help with documenting transportation approval.
I briefly had a Tech Air 5 that I was about to add a tailbone protector to. But then the Tech Air 7 was released, and I upgraded to it since it has the airbag covering the tailbone.
It fits better under my Alpinestar Fusion suit since it fits like a tight bolero rather than a loose/snug vest like the TA-5. It's also little easier to get the track suit shoulder on and breathes better. Part of it is washable, too.
I do not like the adaptor zipper which is designed to fit into some Alpinestar suits, but that's a minor thing.
Regarding fracture protection, below is a youtuber, Hiimchad, breaking his collar bone despite an integrated airbag suit, @ 20:10
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I broke mine impacting my shoulder blade in a non airbag suit. I had a back protector on, but it does not spread out to the blades.
I think the airbag minimizes the severity of upper body injuries. I dislike like the extra layer of heat though, so I chose a well perforated suit.
Last year, I started wearing a one piece chest protector under my suit, since the airbag doesn't cover the sternum. The Alpinestar Nucleon KR-cell CiR which is CE level 2. It is well perforated and I don't notice any body heat increase at speed.