I've seen a few posts on 'cheap' child car seat deals and always look to drive awareness of the independent child car seat safety tests that many parents aren't aware of. Expensive and fancy looking seats aren't always the safest and in most instances it's quite the opposite.
For those on a budget or even if you're not, the Infasecure Rally II is one of the top performers according to the CREP score achieving 4.7 out of 5 for forward facing mode and 3.8 out of 5 for a booster. More details here https://www.childcarseats.com.au/node/1234 and a summary of the best performers for 2021 can be found here https://www.racv.com.au/royalauto/moving/news-information/sa…
Having your kids sit rear facing for as long as possible is the best for safety but often not practical especially with fussy kids. In reality I think the best you could hope for is up until age 3 or so.
For $149 it's a no brainer if you want one of the best for your toddler, preschooler or child.
It is a wider seat so you probably can't fit 3 across in a normal sized car if you needed to. The Infasecure Quattro or Attain Premium is what you should consider if you need compact seats with high safety performance. But these are 3 to 4 times more expensive but would be cheaper than buying a new car ;)
Feel free to share other good recommendations for top CREP awarded seats as I'm still hunting around for compact seats to fit 3 across.
I've got 2 of these, they r great. I bought them at rrp, mainly due to the independent ratings. They're not too hard to fit as well.