I got mine in the mail yesterday, pulled it apart, got the 3TB XT version, put it in my computer, opened command prompt, used DISKPART to switch to GPT, then quick format.
Drive is fast. I archived 1TB of stuff onto the disk already and average speed was 120MB/S.
The interesting thing is the temperature sits around 35c and goes up to 38c during heavy writing all the while my Samsungs idle around 29c and goes to 31c during heaving reading/writing.
It just goes to show the Samsung F1 figured out a way to keep nice and cool without sacrificing speed.