The software works really well: I started a subscription to Spotify thanks to this program, and from now on, I'm pretty sure I will never stop the subscription.
I add new music to my library every week, and retrieve them offline, in case of...
This programs is a safeguard: I subscribed to Spotify because now I can trust I will never lose my songs if Spotify goes bankrupt: I have a backup laying around.
I had to reinstall Windows and the licence was not working anymore (already activated): I contacted the support and they gave me a new licence very quickly. Wonderful.