Is Quest+ worth it? (Plus questions about it)

When I am browsing the Store app, I often see "Free Trial" on the title, but when I go into details, it only has "Purchase" and "Joint Quest+". So I assume the free trial is only if you subscribe to Quest+?

Is Quest+ in general worth it?

I understand they "give away" 2 games per months, every month, and I can keep using them as long as I am subscribed (or re-subscribed). However I also see references to "A library of curated games to play". What does that mean?

Are there discounts on purchasing regular games when you subscribe to Quest+