We own the Cybex Sirona Plus ca now little over a year. What's really positive, the rotation function which is very convenient and buckle up, and get on and off is much easier. We also hooked nothing, despite various pretzel crumbs. Unfortunately, the silver paint wears out very quickly, but that's just look. Our dwarf also has enough space in the seat. On the subject of legroom here but many complain about the poor and therefore evaluate: It is logical that if the child reboard drives, not the legroom has that provides a forward seat. Our legs can simply left and right over it dangle. For us, the safety aspect is however crucial, and prefer my child has a gebrochnes leg in an accident than a broken neck. The Cybex Sirona has been designed as Reboardsitz, and so the impact cushion acts enormously huge but for us it is clear that it as long as possible reverse driving and when the time comes, we will buy a matching "normal" seat. I can only recommend everyone to consult properly if he wants to buy a Reboarder, because as with all seats applies: Not every seat fits every child and in any car. Better to have something continue to provide advice and it have a proper fit. We can therefore recommend the Cybex, although legroom is different from usual course.