I read these a few years back.
I didn't read too much of PSI's LP, but I did read a fair bit of PSII's. I thought it was pretty well done.
PSIV's was pretty funny in my opinion, especially the added dialogue.
I kinda liked the PSIII LP, though I thought they nitpicked a bit too much. Sure, the game isn't perfect, I won't deny that, but I still thought some stuff criticised was a bit too minor. He also didn't speculate on some enemies in places you need to go to.