There is no legal issue with this item, as there is nothing in the laws, I believe, of the provinces to say one way or another.
Has it been tested to safety standards (and only CMVSS counts when it comes to traffic safety standards not CSA)? I don't think so because TC is not into testing such after-market items.
Is it safe? I checked with a few other techs and we feel that it's not a safety concern per say as it does not intefere with the working of the seatbelt. So that's good.
Is it risk-proof? No, as many of you have mentioned that when in an emergency, it could pose a problem for those needing to get to a child fast enough, in the event that they cannot cut the seatbelt to do so.
Does it have its use? Perhaps. Granted that most kids that in boosters should already be wise enough to leave the seatbelt latch alone but there are also the cases where the child can either be problematic or unable to understand then the AngleGuard might come in handy as a preventive device.
So, if one is to use this device, I would suggest have the user's manual or instruction handy where someone can find it. This is just as important as keeping the user's manual of the carseat/booster handy.
Of course, education, reinforcement and discipline are a-must in teaching children the rights and wrongs, but sometimes we do have realise there are cases that this kind of device might be a 'life-saver' for most of the times and there might be a chance of it posing an issue in an event of a collision.
And about twisting the seatbelt half-revolution... I think twisting the buckle upside down works for a 2 yrs old in a carseat, but not for older and smarter kids who are determined to 'play' with their seatbelt latches or get out of the booster seat.
Another use that I think this could be useful is just to cover the seatbelt buckle of an installed carseat. This helped to prevent another passenger sitting next to the carseat accidentally and unknowingly unlatched the carseat seatbelt. This happened to me once years back. Horror of all horrors, I found out the carseat had be unlatched after my mom or MIL sat next to our dd's carseat during one trip. I didn't know how long it was unlatched - could have been only the night before I found out or could have been couple of trips. So, I used the Safety 1st seatbelt buckle cover, similar to the AngleGuard just to keep the carseat's seatbelt latch covered.
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TamC
Certified Canadian CRS Technician