1 : Fix Wlan TKIP in game loop : pes 2009 , fifa , motorstorm , GTA cw ect....
2 : Fix Video Output With 5.5X and 6.X Games like GTA Chinatowns War
3 : Fixed recovery menu with make Pandora and make battery normal
4 : removed splash screen http://www.pspgen.com but you have another spash screen in red color for let you know if the decrypter work.
I would recommend switching since it is the latest and greatest.
Worst comes to worst you can always roll back to M33 if they ever decide to update again. I was using ChickHEN and CFW Enabler for a good while and they blocked playing on the internet.
I was interested in playing Gran Turismo and couldn't without GEN and Decrypting it so I switched to the more permanent GEN. I then discovered you can access the PSN with it. Then they blocked it again. I'm guessing with their updates and such they will hack again and they are keeping it up to date so you can play ALL games. You shouldn't have to decrypt anymore every time you want to play a new game.
Make sure you read the comments before installing just in case they release a version that isn't fully tested. Apparently Version C was a flop and was bricking PSPs so you just have to be careful.