As an R21 user I started learning Houdini about 10 months ago. I like it and I like the company.
Is it the 'perfect' software? Heck, no, far from it, but they treat their customers with respect.
Same with Redshift Materials. There seems to be a whole library of RS Mats only available to Maxon ONE subs. Too bad, because they easily could be used as a teaser for C4D only subs to upgrade because they see what the engine is capable of (since RS CPU is sadly rendering like it is 2010 again...)