Hi guys,
I was out of these psp-hacks for about 4 months and now there are number of CFWs in the scene now, I have PSP 2004 with CFW 5.50 GEN D3 with prometheus add-on just now I came to know that another CFW for 1000 and 2000 serious PSP is released v6.38 me-2. Is it worth upgrading my firmware to this new Full CFW?

Though currently I am not planning to play any newly released game which might require newer firmware.

Its like survey should I upgrade?

I mean is this firmware stable enough as compared to GEN series CFWs or dark_alex's firmwares? What are the pors and cons of upgrading??