If you're not willing to use it then you should get rid of it.....I'm playing all the Uncharteds, RE6, all the House of the Deads, And a lot of the Sega classics that just got added currently. It's my favorite thing to do in between premium titles that I actually care about when they are released. I paid for the year and I enjoy it fully.
The only drawback for me has nothing to do with PS Now, but with the monopolized ISP here that has fucking data caps.......I can blow through my allotment without even knowing it halfway through the month and have to pay overages......All the games are in HD so they run a pretty hefty load if I marathon all weekend.