I have got their Rs1250 for 10GB plan and the speed is fantastic, no complaints so far apart from occasional disconnection for a second or two.
I have used torrent flux myself and its a small script and is very easy to install. You can download or seed files from your server and once a file is downloaded onto your server you can download it in your own time using a FTP client on your computer. I use Filezilla for FTP.
Its a very easy setup and will take about 15 mins all in including buying a server and setting it up for this purpose and installing filezilla on your machine

Its the best thing to do if you have a connection that is unlimited at night for example or you have a very high speed connection access some where you can go and download a few GBs in mins

Go check out the speeds students get in one of the IIT campuses or even other engineering colleges

they are not allowed torrents but FTP has no restrictions.