Nirvana Feminized Pick and Mix Seeds

I was looking at pick and mix seeds and it appears their all feminized.Are nirvanas feminized seeds good?I was thinking about getting a ice feminized and a snow white feminized their only 10$ each and I wanna grow them both lst under 300 watts of cfl. Are these nirvana feminized pick and mix seeds legit has anyone ever grown these pick and mix nirvana feminized I dont want to have a hermie or less potent plant . I never bought seeds myself before I just grown some seeds I found in regs or dank before.