Does anyone have the new Britax Kidfix XP SICT? It looks good, but is only available in store from Mothercare and I haven't had any luck tracking one down yet (they can't order them apparently!). I was wondering if it's significantly better than the Britax Kidfix SICT which we bought for our other car. It has a pad thing on the seatbelt which is supposed to reduce the force on the child by 30% in a ff crash.