For sure you get an insane amount of power for the money and they are built rock solid to last as long as any engine on the market today. I can't say enough good things about these mills. I just wish there were more usa outlets for them. Ebay is also a great place to find deals on them. I've been getting turbo head buttons for about $10/ea and bought a lightened gxr 5 port cooling head for about $25 to my door. They sell crankshafts and p/s for cheap as well. A month or so ago i picked up a brand new carb for $30. I figure by the time spring starts i'll have a brand new gxr 5port as a backup