At that price I'll probably be buying those, I saw Viveza and Silver Efex some years ago and was very impressed, and I've been after something like Color Efex for a while now as I'm crap at that sort of thing in LR & PS.
Well that's just mean! I'm nearing the end of a 15 days trial version I've had kicking around for a while, and I've just uploaded some of the results of my playing around with it. I was half-hoping I could persuade myself I didn't really need it.
That is on their USA website, though. Is the license actually valid outside US? I know software licensing can be very specific about the end user locations.
If you simply type www.niksoftware.com you get redirected to the same page.
If you look just underneath where it says Get the full Nik Collection by Google, now just $149. you'll notice it makes reference to EU customers so I'm guessing Google are implying it is 'safe' for us (as EU citizens) to buy.