I joined ~2+ months ago. I LOVE it!! Paying the fee keeps me motivated, but I feel great afterword. I used to come home and just get sucked into the couch after work. I hit Curves on my way home now and I actually do things around the house.
Not to mention, I've lost a couple pounds and the whole exercise is a good thing in general.
The workouts go by quickly. Being all females, no one's out to impress anyone else. People work out in jeans, sweats, scrubs, anythings. All shapes, sizes and ages too. I have yet to meet anyone who has tired it and not liked it.
As for teh price, I do teh autowithdrawl and a 12 month contract. This makes it $30 per month. $35 must be for month to month. Besides the lower price, teh 12 month contract entitles you to passes at other Curves if you are going on vacation. You can either get a 1 month pass at anothe rlocaiton or transfer membership if you are going to be away for a while.
Good luck!