We took advantage of a 6-weeks-for-$10 special Mieko's had going on in April and May. It just expired, and we haven't decided whether to sign up for a full membership.
Here are the pros (in my opinion):
-tons of weight equipment (both free & machines)
-tons of cardio equipment (more treadmills than anything else, but still plenty of ellipticals, bikes, & stair-steppers)
-a decent amount of classes available
-cheap monthly prices after you pay the joining fee.
-the joining fees are almost prohibitively high for our family. When we talked with the membership guy, each person had to pay a $49 "processing fee," and then most levels of membership had an additional "joining fee" along with your monthly fees.
-the advertised $18/month package stipulates that you cannot go to the gym between 3-9pm on weekdays.
-we went to check it out and ask about prices and ended up being there for over an hour. We didn't feel TOO much pressure from the sales guy, but we still had to answer a lot of annoying questions like: "how much weight do you want to lose?" etc.
-they do not have towels, either for cleaning the machines or for use in the locker rooms. You have to clean the machines with paper towels & spray provided at various points in the room.