Why does everyone on here say Space Mountain is rough? All 7 times that I went on it in January (my first time to WDW, btw), it was perfectly smooth. I went on both sides, too. Believe me- I know rough roller coasters and this ain't one of them.
P.S. I also prefer MK's Space to DL's now, too. Way more fun, with all of the drops and tight turns and MASSIVE airtime in the front seat!!
I just wish they had discernable music ON the ride, instead of the completely unnoticeable soundtrack they currently have. That is my only complaint about it.