Im trying to mount files to an NTFS format drive, I read on the internet that either Tuxera NTFS or MacFuse work for such things. However TuxeraNTFS filled my USB drive with space that should be free after file deletion, and I had to use windows to access the drive and delete the hidden folders created by Tuxera. MacFuse never installed correctly and states that "MacFuse does not appear to be installed"..
Is there any other reliable program that 100% works with NTFS drives ?
Tuxera - I've used this program with no issues in Lion and Mountain Lion
Paragon - site claims to support Mountain Lion, personally haven't used
OSX Fuse - a freeware successor, don't know if it works with Mountain Lion, personally haven't used
I don't have a retina MBP to test with, but any of these should offer you a good starting point. Since you've already tried Tuxera, Paragon appears to be your best bet, while OSX Fuse would be a good option to try out.
For 10.7 I used NTFS 3G with MacFUSE, everything was fine. Now with 10.8 I use Seagate free NTFS driver (the same as comercial Paragon NTFS for Mac), also works well. Great when purchasing an external HDD you get free driver for it!:)