Omni/Tank drive system

Well it was rather easy to install the omni wheels.  They made our robot turn much faster and easier and were around the same speed as regular wheels.  But the problem we experienced with them is that it is very hard to control and turns just too easily.  Now the tank treads we had some problems with.  at first it was getting the design then our motors wouldn't work right, then we had to remake the tank treads, and our battery and charger was having problems as well.  But eventually we got them to work and found out that tank treads have great traction but move extremely slow.  Which also made them turn pretty slow.