It depends what you are after, from your name "futurenadia" I assume you are looking for competitive gymnastics and doing well at competitions. In that case check out the equipment. Do they just have the basics or do they have the extra stuff like foam pits and tumble traks for learning the more advanced skills. Is there plenty of equipment or do you see 10 girls sharing 1 set or bars or 2 beams.
Do the coaches seem to use the equipment well and you see kids doing different typoes of drills and exersizes or are they just doing straight routines and skills.
Do the kids seem happy or do they seem stressed or scared? Are tthe coaches encouraging and supportive? or do they just telnd to yell a lot and coach through fear?
Do the gymnasts seem to be using their time well or is a lot of time wasted standing around?