Basic info about SoulseekQT

Hi all,
I couldn`t find basic information about the new version, so I`ll ask here (and hope it becomes explicit).

1. Can I run SoulseekQT together with Soulseek?
2. Is switching to SoulseekQT safe for my current music collection?
3. What are features that users would gain/lose switching to soulseek QT?