It's Firewall is quite decent and it uses the Kaspersky signatures which are quite popular, but apart from that it didn't improve a lot in the last months/years. No point of trying until the new Next-Gen version comes out.
What I know is that it still does not provide the same antimalware protection as Kaspersky itself, it seems to use either an older engine version or with some features disabled (cloud maybe). I have seen it miss things that Kaspersky catches consistently over the years.
The firewall, probably remains good, but with Windows itself now offering a competent firewall, I think the selling value of the firewall is not one that would drive customers to buy in large numbers.