Hi - I paid $49 to sign up for the year then its about 31.00 per month with taxes. They take it out of a checking acct I have - only use for that acct.
They run nice specials - mine had a food drive in March and if you brought in a bag of groceries, they waived the yrly fee (wish I'd known that
I'm pretty happy over all although I've hit a platau - going to give it another 4-5 months.
I had originally bought a gift certificate for two months and tried it out - I would suggest that. You can always apply any unused portion towards a full year membership.
Another tip - try multiple Curves before settling on one. There were 3 within 10 mins of my house but the machines were all loose. The one I go to is 15-18 mins but the machines are tight, place is large and airy and they offer classes and other perks. The hours were also longer than the ones near me.