Yup, everyone's decision of cost/benefit will be different and whatever suits you is fine.

But I can't help but notice that you're not from Canada, land of the 3 year, many-hundreds-of-dollars-cancellation-fee contract. (Oh, and if you do anything to your account -- move, change your plan, get a different phone, speak to a customer service rep :P -- they reset the countdown back to 3 full years.) Being held hostage by a cell phone plan is a national past time here, so some of us struggle with this issue more than you do.