I've played at Pekin paintball, and at Tuscola. I don't remember the name of the field.
Sudden Impact has changed soo much since I started playing there. As of right now they have so many new fields. They have brilliant setups for speedball. I believe they have 3 speedball fields availible now and another on the way. They still have there woodsball fields, which I don't play anymore. They have 100 acres all together. The field setup isn't the best, but its acceptable. They don't have any electricity or running water out there, so you can only pay with cash or a check. They do have a bathroom, so don't worry about holding it for the day. The area doesn't look like much, but it gets the job done. There is plenty of space for everyone. I've been there on both busy days and slow days. I like slow days because you get more access to the fields, but busy days are good too. They don't really have much of a shop. They can fix some guns b/c they have unlimited tools. Sometimes they have some stuff there you can buy. Like lanyards, stickers, tank covers, sometimes tanks, and other stuff. The staff is excellent. I'm good friends with the owners son. They are all nice people. For teams, they hold practice on sundays and paint is cheaper. So it works great for my team practicing against other people. There paint prices in general are good. Its 5 bucks for all day air and if you don't have to rent anything you just have to buy paint after that. Its a great field with a great staff and overall the best I've been to.