I had seen iZotope mentioned many times in the forums, but never really sought out 3rd party plugs. Nectar happened to come with an Addictive Keys promo, so I got to try it, and think it may have been sales promo for Nectar 2.
As I just got my first-ever condenser mic, I found Nectar was the simplest "one plug" solution to tailor that beast to what I wanted to hear... so Nectar 2 was worth evaluating, and I liked the added functionality of Nectar 2... but even as an "upgrade" now I was looking at $129 or $199 based on version.
This promo confused me in some ways since 1) it is the same price for anyone, and 2) Nectar 2 Production Suite was only $50 over Ozone 5/Alloy 2 alone (and normally $299). Gave me a little head scratching, so I gave them a nice "10-day trial" workout. I was initially only looking for Nectar 2 (regular) which would have been the $129 (upgrade), but felt the other two had enough functionality to sell themselves.
Time will tell with this all, but I have been impressed thus far. I can achieve a lot with a "single plug" for the first time, and not been a fan of "piling plugs" onto anything out of habit, I guess.