I personally know that the review accusation is off. I have spent hours reading reviews at Nirvana-Shop.com and I've seen plenty of bad reviews as well, usually complaints about missing deliveries, cracked seeds, etc... Now that they give points for reviews and the reviews are screened first, I don't trust the latest reviews. The old reviews are still spot on.
AND, Nirvana has several strains that have been in breeding for years that are stable and considered F1 strains, such as Bubblelicious, PPP, Raspberry Cough, Royal Flush, Snow White, Sterling Haze, Super Skunk, white Castle, White Rhino, Aurora.......
I've had nothing but GREAT service from Nirvana, fast shipping, and excellent seed stock that has a high germination rate. The Bubblelicious strain is outta this world with resinous buds that can get as wide as your fist. Their Papaya and NYPD are also top strains.
The owner of Nirvana Seeds has been breeding and traveling the world over to find the best strains since the late 1980's when he worked for Positronic Seeds. While they do import and carry other breeder's seeds, they also do their own cross breeding and seed production as well. The poster that called them a simple seed house was way off base. It's amazing the things people will say when you can't hold them accountable for it...
I suspect you also have some people in here saying Nirvana is shit and they have never ordered from them. Those would be Attitude fan bois. I like Attitude too, but I also like Nirvana and have no favorites. It depends on who has what i need. At least Nirvana doesn't tack on a "stealth" charge and make you pay shipping twice. They'll resend your order if it doesn't arrive or there is a problem, even with germination. Try to get Attitude to honor non-germed seeds. They won't even talk to you about germination failure.