Subscribed for a month yesterday in order to get the 14 for '14 PS plus discounts.
The amount of stuff I got with it is quite... staggering. I mean... ICO, SotC, DmC, Binary Domain, Uncharted 3, Bioshock Infinite... all that for a month and $10. Not a fan or too interested in the latter two, but deary me, that is huge value.
And let's not mention ALL the other discounts.
Considering to subscribe for a year, now.
To answer your question, it is absolutely worth it!