Yes, I have seen the seat you are talking about. I really feel that it was just a once a deal sort of thing as I have not heard of it again.
Sunshine Kids Radians are sold in Canada as well and in the 2 years of me being an advocate/tech, I haven't heard of it again. I don't know if there was anything "after market" on the seatbelt or if there were other factors pertaining to this incident.
As for the
Safeguard seat, VERY nice seat..AMAZINGLY easy install. You literally press a button and it tightens the
LATCH install! The cons is that it only holds up to 65lbs.
There is a
BRitax regent that is the tallest, highest harness weight seat on the market. It will harness to 80lbs and around 53" tall. I, personally, own 2 of these seats and LOVE them. My kids love them as well. You will have to have a tether anchor for this seat when your child hits 50lbs+.
There is also the new
Graco Nautilus that is at WalMart. It will harness to 65lbs, then turns into a
booster up to 100lbs. They run about $150. The harness slot height is about 18-18.5" tall.
How old is the child and how tall/weight?
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 | SafeGuard - Click for more info |  | Indiana Mills and Manufacturing (IMMI) is SafeGuard’s parent company, and has been in the business of developing and manufacturing quality safety systems for every facet of the transportation industry for over 40 years, covering everything from the heavy truck and agricultural industries to child seating.
IMMI has a world-renowned reputation for creating and promoting the highest rated safety harnesses and restraint systems available today, from integrated child seats in production vehicles to campaigning for increased use of safety harnesses on public transportation systems. Based in Westfield, Indiana, SafeGuard has been creating and testing essential components used across the child safety seat industry through their state of the art crash testing facilities since 1961. The SafeGuard and SafeGuard Go are IMMI’s first direct foray into the child safety seat market, and the results are simply outstanding. No other car seats or boosters are designed with as much attention to structural integrity, ease of installation, and total child safety. This seat has been subjected to the most thorough and extensive testing “ever conducted in the industry”: virtual prototyping with computer models; rigorous front, side, and rear impact crash testing; and environmental testing in a range of climates and road types. | |  |
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