While there are plenty of benefits for indoor soccer (touches, ball control, speed of play), there is still one big negative: injuries. I agree you can get injured in outdoor just as easily. However, my experience in indoor, is that many players come to games ill-prepared for the game either due to experience or come in the game cold, without much warmup. Also, many of the facilities in the this area are less than desirable (Arnett's especially).
Joel Wilson

Indoor soccer has both good and bad aspects. The good would be touches on the ball in a small-sided, fast paced environment. However, bad habits can easily be developed. Also, injuries are more likely and there is little or no time alotted for dynamic stretching.