Just got my G2, it's my 3rd VR headset after Rift S and Quest 2.
I get horrible performance on some games and apps, at times even steam VR home lags. In some games suddenly one or both screens go black for a few seconds before coming back. A game like Medal of Honor Above and byond, won't even let me be in menues. As it just was too laggy and choppy to get anyting done, and I had to ctrl, alt delete myself out of the game. And even in games that seem to run ok, I get these blackouts.
My system is
Intel Core i9-9900K Coffee Lake S Prosessor - 3.6
ASUS ROG STRIX Z390-F GAMING
G.Skill TridentZ DDR4-3600 C15 DC SR - 16GB
Samsung 970 EVO SSD M.2 2280 - 500GB
ASUS GeForce RTX 2080 Ti ROG STRIX OC - 11GB GDDR6 RAM