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Do not buy the 7200.4 from Dell. It has the G Sensor and will lockup the MacBook Pro. Take it from experience. Wait for NewEgg to get theirs back in stock. Also if you don't believe me, check the NewEgg reviews.

I also believe someone on here had the same issue. I bought the NewEgg 7200.4 and everything is good here, just not with the Dell Momentus, lol.
 
I haven't seen any issues with the drive in MBP's.. I already ordered mine and I'm putting it in an optibay. I already have an SSD as my primary drive.
 
I just checked the reviews on newegg and one person said it was incompatible with the macs sensor, but also said it was based on someone else saying so. I'd take that with a grain of salt..
 
Since Dell did not mention otherwise, warranty might be 1 year? on the dell version.

Normal version has 3 year warranty.
 
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