Best Buy's PRP for X360?

OK i have a Product Replacement Plan(PRP) with Best Buy. Pretty much if you have ANY problems with your 360 or anything that comes in the package you have you can bring it back and it will be replaced with a brand new 360 package right off the shelves. I have the premium package, and the PRP is a 2 year warranty. Now i've used the warranty since my 360 has gotten RROD, i used the warranty twice and am on my 3rd 360.Now the disc drive is messing up and leaving big scratches on my games, so i'm thinking of taking this 360 in for a replacement brand new one off the shelf.My question is does anyone know if this will be a problem to do? It will be the 4th console i've gotten from them within 2 years. It is a 2 year warranty but i have heard you get unlimited replacements in the 1st year and the 2nd year they send it out or something. The other thing i've heard is you get like 3 replacements and they send it out. I don't know if any of that is true and that's not what i paid for they told me 2 years PRP so anytime within that 2 years if anything goes wrong and it continues over on any new console i get. So does anyone know if this will be no problem or what?Best Buy's PRP for X360?
Nobody knows? i've also heard you can turn it in if its broke for $400 store credit, so i would like to do that and keep the extra 50.

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