I did a RAID 0... Then one drive failed. I had to re-install the OS.
I can say that you do see a slight speed increase but since I've had the experience I had I would have to say it's not worth it and I will just wait to RAID something more relyable like a couple of SSD drives. But with the speed of 1 SSD a RAID setup may not be nessary.
But all in all, yeah you will see a speed increase.