Wages are meager. For the amount of work you put into this job it does not pay well enough. Incentives and extra perks are not enough to balance out the almost minimum wage most of the employees are living off of. Reviews are great - but the pay increase needs to be more.
Guests can be demanding, mean, and downright vile at times. This is always true of any customer service position, but it seems that we really get looked down on for things that may not be in our control (can't make a child smile, you only have a limited amount of time in the camera room, guest was not prepared, etc.). You must be prepared for this and know how to handle guests at their worst or you will hate your self and your job.
Faced-paced with little down time. The studios get hot and sometimes there is little time for you to take a minute to just relax. I sweat at work everyday. I also know when I need to excuse myself to "go to the bathroom" so I can have a minute of peace and quiet. If you cannot pace yourself you will burn out quickly.
Sometimes there are no one to cover your shift. During off-peak seasons some studios only run with 2 or even 1 employee. If you get sick, tough. You may still need to come in and work through it.
The company offers benefits only to full-time employees. While they are good benefits the future of the funds available concerns me.