Yup, by far the most expensive plugs I own personally, but also without a doubt the first I'd buy again if starting over (the Limiter & the EQ at least). Also they do a 'custom bundle' thing where if you buy a few at the same time, the 'per plug' costs get cheaper. End of the day, the demos are free (bar the cost of an iLok if ya don't already have one) so you can see /hear if they'd be worth the investment.
I'd plumped for the wavearts bundle a few months before the sonnox bundle came out as AU, based really on cost & reviews, but since trying & forking out for the sonnox, the wavearts haven't nade it onto a single track I've made since, whereas I haven't mixed a single track without using sonnox EQs & limiter since getting 'em, so not cheap pricey but better value for me at least than the 'cheaper' bundle!!