Yes for me. We use most of the features regularly so it was worth it to us. I renewed on the 30 month/$15 per month plan. I usually don't keep cars much beyond three years so I'm covered thru most of the ownership period.
If AC isn't used much I can see how it wouldn't be worth it to renew.
2016 A6 Premium+, SLine, Florett Silver Met./Black. 3M Crystalline 40%
2013 Q5 2.0t, Cuvee Silver/Black, Pano, 19", MMI/Nav, B&O, Advanced Key, 3M Crystalline (traded).
2014 BMW 328i X Drive, White Metallic/Tan, Nav, 3M Crystalline etc.