The only reason I use GFT is because sometimes i like to download newly released games asap ( by asap i mean within 30 minutes of release ) and GFT has a big of seedbox users: normal users ratio, so initial peer swarming doesn't lower speed ( TL get aroubd 1000 leechers on a popular release within a few minutes which makes download speed really low )
Longevity on GFT is the biggest issue, torrent die within weeks. Don't have too high expectations.