Hi I have an Uuni (Ooni I believe is the new name), as above definitely persevere and it turns out good pizzas, bit it takes practice. It helps having two people if you're looking to get a production line going.
If you're happy to churn them out at a leisurely pace, it can be done by one person
I've not used the Roccbox, but it's also getting quite good review and meant to be quite a decent product. There's quite a price difference the two here in the UK.