I've been using an older AC1300 USB adapter and getting decent speeds in my office - around 180Mbps down, but the old adapter was dying (thanks kiddos for bending the USB connector!) and I have a Wifi6 capable router now.
I tried a few different options but was seeing unexpected latency (ping spikes) that were obvious even in regular browsing. On Wifi6 this BrosTrend adapter got me my full 300/100 Mbps with no issues, on old wifi 5 router I got 205/100Mbps - still better than my old adapter!
Running a ping against google DNS (8.8.8.8) I see no spikes that I saw with other adapters I've tried. Everything is great so far!