The first time I took creatine was about 2 years ago, and it honestly help me jumpstart my weight lifting. At the time I started taking it I had just started squats and deadlifts.
To answer you question about speed...I had raced a buddy in the 100 meter at the end of my freshman year of college. He had been a sprinter in high school. In the end he probably won by a good 20 feet. It wasn't even close. I started taking creatine monohydrate that summer while doing some core lifting (squats, deads, bench etc.) and when we raced in the beginning of my sophomore year, we were dead even. Much of this could be attributed to the creatine, but a lot was due to the squats that I had started doing on my small soccer frame of a body. That summer I also gained about 10 lbs, from 165 to 175. Maybe 3 lbs. of that was muscle. The rest was water weight. It will puff you up a little, but it was worth it for me.
On my second dose of creatine, I took CEE from Anafit, which is a sponsor of this site. This creatine didn't particularly give me great energy in the gym like the monohydrate, but it sure did allow me to push up the weight. I hit a 405 lb. deadlift last summer, which is something that I have yet to accomplish while off of the stuff. I gained about 5 lbs. while on cee, and most of that was definitely muscle. The lack of energy could have been from the fact that I had been on creatine before. Your first time on it should be the most noticable in energy and overall performance.
Creatine should be used by what it is, a supplement. As long as you train right, you will see the results you want. It will help you along the way.
I have been off creatine for about 8 months now, and it's great to know that I can lift 4 days a week and still make gains without any supplementation. It will be that much better when I decide to get on something in the near future. Right now, I'm about 7 lbs. heavier than I was during my last creatine cycle, because I'm bulking. My strength is around the same. I'll probably get back on cee toward the end of the summer after my cut.