I've got that one! I think? The Powertrain? Love the carrycot but have never used it in it's carseat capacity as it takes up 1 and a half seats and we have an older ds! As sitting bull says, it's not lightweight but we find it easy to put together, and I like it being quite sturdy for when I'm hiking into town in pants weather! Oh and ds1 hasn't managed to knock it over yet despite hanging onto the handle while we walk!!
the single waist strap isn't a good crash restraint, we additionally used the 3 point harness ( for the sit up car seat) when the cot was in lie flat position. not sure how that would change those crash test pics - though side to side brain movement is more likely to be fatal in a crash than front to back movement as far as I know.