What's your experience with Roller Lifters in Stock?

[dragracerray]

So lets say someone is thinking of changing cars into a Stock class where Roller Lifters are legal. I would like to hear if the grass is greener in Roller Lifter land.

-What is your lifter program? Rebuild after X passes? Replace after Y passes?
-Have you had a lifter problem? What happened when you did?
-What is your Valve Spring program? How long do they last before you need to change them?
-Tell us the "good", tell us the "bad"
-Tell us what you "love", tell us what you "hate"
-If you have experience with Flat Tappets what is your opinion on maintenance costs between Rollers and Flat?

Ray