My kids are both on balance bikes still but first time I bought a halfords one and it has been more awful than even my low expectations. I have had to change the brake lever for one that actually works, grips from ones not made of slippery plastic and changed the seatpost and stem bolts to ones that actually clamp it properly.
Then recently for my youngest I bought a Frog balance bike and it has proper parts that work and weighs a lot less and he was able to learn to use it much faster and easier, it was 50% more expensive but 100% worth it.