My 3 year old daughter and all her friends absolutely love this! It is big enough for four 4 year olds (with room to spare) to jump, run, have fun and use up all that toddler energy. We are fortunate to be able to set this up indoors and outdoors, making it perfect for rainy and sunny days. It is so easy to use and the quality is amazing! All you do is roll it out, blow/set up and let the fun ensue! From easy ordering, fast shipping, great customer service, and a quality product, we have zero regrets making this our daughters big Christmas present this past year! Thank you BlastZone for making a quality product that our daughter loves and that we can watch her enjoy worry free!