High back booster for 5 year old seeking recommendations

[Mmr224]

Looking for a safe easy to use, light, easy to fit high back booster. Ideally isofix base clips. For grandparents car for a 5 and 6 year old to share on different days. Looking for one going up to 150cm.and with good safety ratings.

I got a Mybabiee one on Amazon, it has isofix. The seat itself is really comfy and nice and spacious. I was really happy with it so bought another for younger dc.