Next generation's grape god was money for me, but the way some people talk about them I got lucky both times I order some in '09-'10. Both regulars and feminized produced good large buds in 56-63 dayish, they hated being top so only made sense to SOG it. I used a male from the regular pack and it made some fire crosses as well.
Downsides, it molded easy and is a total indica stone, that's nice but can put you in sleep mode quick.
Upsides, it clones and grows easily, had one liter bottle sized buds, tasted great (floral, grapefruitish, citrus) and looked pretty with some color change in cold temps.
I replaced it with a dinafem power kush, was a freebie and run it for the hell of it and it ended up being far more potent and was very mold resistant, plus I had ran the GG for years and wanted a change to the sativa-ish high the p.kush gives me. Also the kush spreads out more so I could run less plants.
Not sure if next next generation is worth the effort to you but if you score a nice G.god pheno, it's hard to beat. Again I would have kept it but after years of cloning from a clone, the G.god lost vigor and potency. If you just keep them a single cola bud you'll have some huge floral smelling bud.
Ran many other strains over the years but that G.god had SOG down like math.