has anyone got either the Bebe confort 'omega' high chair of the new silver cross 'sovereign' high chair. I think i have narrowed it down to either one of these but cannot really find any reviews on them. Really want a goo high chair that reclines and is height adustable but am concerned at some reviews i have read about some high chairs suddenly 'sliding' down to the lowest height with no warning and the baby still on board! - any advice really appriciated. x