It's... okay? Hard to finely detail every. It is fun and cheesy and has an element of self awareness that is actually adorable. Honestly, given the outrage seen from outside and from within the community on some elements (cough ep.4 cough cough) - Played worse, seen much worse and that is fine.
Ep. 1-3 is generic, but entertaining and tries to keep its pacing while moving forward.
PSO2 - the animation/Oracle - Ep. 4 ... yeah, you can tell was written during the time of the isikai fad and used and the height was dying down. It's there. It has good moments as well as the cheesy ones - nothing outrageous or line crossing. (Still abetter love story than twilight lol okay sorry... my bad.) All in all, it is fun, very um. Not anime, but driven. Dunno whats driving it, but it is driven, and nobody is going to stop it from enjoying it's drive.
Ep. 5 felt like a nice call back to the original series, especially Omega and the many call backs to PSIII in many elements while throwing easter egg after easter egg from the rest of the series with region names/descriptions and plot drive.
Ep. 6 a nice closing of what has been, what was and use of call back an returning of other characters, and unique choices for character focus and dialogue.
All in all, a sound 7.5 / 10 not the greatest (the greatest often get shelved to be kept as a cherished memory to not be tarnished); but fun and entertaining, and obviously will play again, and again.