I thought about it, but I investigated a bit and the gym I eventually joined has the same sort of 30 min circuit as Curves, plus has a pool, plus whirlpool, sauna, steam room, many specialized pieces of weight
equipment,
exercise classes, and tons of other helpful things available (kettle balls, steps, balance balls, etc)
And they have optional personal training packages.
Its cheaper than our Curves here (this one is $35/month) and has no contract, its month to month.