Even though the leaked torrent of the images match exactly to that which was made available to Technet/MSDN/Connect (still verify the hashes and CRC with the known values) and they will be exactly the same on the public offering on May 5th. I still don't blame anyone for waiting and getting it directly from MSFT.
Just please follow MSFT's recommendation to do a "clean" installation instead of an upgrade of any kind. Back up your important data (to a different partition or external device), use the MSFT Easy File Transfer (it really works) and then wipe your partition by deleting it, re-creating it, format it, and then install it. So many have done upgrades (in place or from boot) and are now flooding the various forums with issues caused by upgrading.
Also, keep in mind that you will have to do a clean install of the RTM when it released, so think about that as you continue to enjoy this fantastic RC of Windows 7.