Is this a good buy? Nanolux ballast

As title says I am wondering if this is a good buy or not. I am big on magnetic ballast for whatever reasons, usually because i can fix them. And Ive had every digital ballast I've ever owned go out on me. So i don't know? The digital ballast that went out were the first generation lumanteks and I'm hoping the quality has improved over the years.well amazon has a deal 4-1k's Nanoteks with 4 sunblaster bulbs for $840 including shipping. I don't see a warranty or anything. What would you do? Plus rep for answers

Oh yeah think link..

http://www.amazon.com/gp/aw/d/B00KTFC69O?cache=9d98af97051d17afb5002ac83ffbaf9f&pi=AC_SX110_SY165_QL70&qid=1408857540&sr=8-106#

Nobody? Is the nanolux good? Or is buying something without a warranty ok..

Hopefully someone will give you an answer, I grow with LEDS but I'd be careful with that many digital ballasts I hear they give off a shit ton of rf freq, can mess up your neighbors wifi and shit, I'm considering adding a magnetic one to my led grow

ive had one of those 1k nanolux and a 600 going pretty much 24/7 since december only issue ive had is one of the fans got hung up abt 3 months ago on the 600 but as soon as i touched it it started again and havent had an issue since they run nice and cool compared to my phantoms ive got a few other friends running them and they all like em so far