Best high back booster?

[Tailtwister]

We currently have our 5 yo in the Britax Evolva 1-2-3 plus. He's in the harness atm, but is rapidly approaching the 18kg weight limit. I'm reluctant to change him to the the belt option as the seat isn't isofix.

Any recommendations for an isofix high back booster? I've seen there's a Maxi cosi isofix one, but was wondering if anyone had any feedback on it or any other suggestions?

[Tailtwister]

Thanks PolterGoose, I wasn't aware of that one and it does look good. Better price than the Maxicosi one too.

[lagoonhaze]

And on offer at boots.com.

We have it and love it.

[RobotHamster]

The maxi cosi isofix one is brilliant. The isofix bars retract so you can easily use it in non isofix cars.