Some quick feedback regarding the Unifi AP 6 Lite. I bought a pair of these thinking to upgrade my two Cisco 3702i.
Works decent for WiFi 6 (802.11ax). Speed is faster than WiFi 5 (802.11ac) for most devices like smartphones and laptops. However the WiFi 5 support (which most clients use) on AP 6 Lite is not as good as my Cisco AP. This is because the AP 6 Lite only supports 2x2 MIMO and the Cisco supports 4x4 MIMO. So when I connect clients that support 3x3 or 4x4 on 802.11ac, I get faster speeds on the Cisco than the AP 6 Lite.
So what did I do? I upgraded my Cisco APs to 2802i (which support MU-MIMO and 160MHz channels) and also kept the AP 6 Lite for WiFi 6. Created a separate SSID for WiFi 6.
Some data:
On my 2018 Macbook Pro 15 (supports 3 streams, 802.11ac onlyl), I get 1170Mbps when connecting to the Cisco 2802i but only 866Mbps when using the AP 6 Lite (802.11ac).
On my 2020 Macbook Pro 13 (supports 2 streams, 802.11ac only), I get 866Mbps using Cisco 2802i and 866Mbps using AP 6 Lite (802.11ac).
On my 2021 Lenovo Yoga 6 (supports 802.11ax), I get 1733Mbps using Cisco 2802i (802.11ac) and 961Mbps using AP 6 Lite (802.11ax)
Bottom line, Unifi AP 6 Lite works fine for both 802.11ax and 802.11ac, but if you already have a decent 802.11ac AP, it will probably perform better than the AP 6 Lite for 802.11ac clients that support more than 2 streams.