Dublin card worth it?

[hz80408]

There's a sale on the Dublin tourist card, 20% off. We're there 2 days so the 2-day pass is on sale for 44EU.

It includes Guiness, Jameson, Christ Cathedral.

That doesn't seem worth it to me, since those are the main paid entry sights we want to see, but I'm curious if anyone else has insight?
www.dublinpass.ie/default.aspx