Meer over PSN+:
Games: enjoy loads of PlayStation Network games, minis and PS one classics plus premium avatars and dynamic themes, all worth at least £200* a year. You'll also get exclusive PlayStation Store discounts and early access to demos and beta trials. Content is updated every month on PlayStation Store, so there will always be something new to enjoy.
Full Game Trial: try before you buy with a one-hour trial of selected PlayStation Network titles and Blu-ray Disc releases.
Automatic Download: receive the latest PS3 system software updates, all your game updates and even game demos without lifting a finger.
En dit staat op de
officiële Nederlandse informatiepagina (in het Engels ja):
Cross-game Voice Chat: invite your friends to chat online no matter what game you're all playing, even if they aren't members of PlayStation Plus.
Maar dat staat weer niet op de
Engelstalige pagina 
Volgens
deze EU-blogpost behoud je je progress en trophy's bij een Full Game Trial.
Ik kijk de kat in ieder geval even uit de boom.