Does anyone use Baymard Institute Premium? Do they provide reliable and up-to-date information?

I'm trying to decide if I want to purchase premium access to Baymard Institute Premium, or a volume (essentially an ebook) from Nielsen Norman Group.

I really like how interactive Baymard's premium service is, and I think I'll be able to reference it as I work much more easily than an e-book. So, the UX of their UX information is better than that of an e-book. :) However, I'm not sure if their best practices are reliable and up-to-date.

Can anyone speak into this? Thanks in advance!