

It works very well for me. My evidence that it is private is that I download plenty (more than 1 TB per month) and I never get a copyright notice from my ISP. When I torrent non-privately I get plenty of copyright notices, sometimes several times for the same torrent.
It does have, however, some major performance issues. It can be very slow, and it can use up a lot of RAM and a lot of CPU. Its internal database, which saves state of downloads, frequently gets corrupted at which point it has to be re-generated, meaning the list of torrents (not the downloads) is lost. It can be quite a bit slower than other torrent downloaders, and sometimes torrents stall for a while as it waits to prepare the network, especially at start-up.
It’s been getting a lot better though with every update, which is quite frequent.
Yes, it is legal. There are many christians in Saudi Arabia, for example. What is usually illegal is public religious practices of religions other than Islam.