There are happy AX58U users around, but from what I see and based on hardware specifications I believe AX68U is the better router for almost the same price. Both were on sale for CAD150 around holidays.
I updated my trusty AC86U to an AX86U because I couldn't get the 1G/1G speeds I was paying for. Now, I get it, even with FlexQOS enabled, a big win for me.