I was a little skeptic after reading the first blog post. Not everything was clear back then and the box model didn't sound that good to me, but now I'm pretty happy about the licensing models.
I'm against renting for several reasons, I won't purchase any Autodesk or Adobe cloud products ever (at least as long as I'm not in any way forced to, good to be a employee!)... but.. I think that Coronas fair Saas model is really well designed. For people who like those renting models it's a good deal.
I personally prefer the box model because of it's "if I don't/can't pay anymore I will always be able to use what I have" feature. The initial price and the subscriptions are in my opinion fair balanced. I estimated the costs we had with Vray (vray 2 price, updates, new rendernodes.. overall costs over the years) for our render farm and calculated what Corona would be (initial payment + yearly subscriptions) and I found it pretty reasonable
I always try to keep in mind: I want the people who develop the software I need to make money to be paid well, so I don't have to worry that the product will die.