Question Ferry Recommendations: Gdansk to Stockholm

Hi everyone, I'm planning a trip from Gdansk to Stockholm (Nynäshamn) and looking for ferry recommendations. I've come across a few options but would love to hear from anyone who's made this journey before. Which ferry service did you use, and how was your experience? Any tips on booking, onboard facilities, or what to expect during the crossing would be greatly appreciated. Looking forward to your suggestions!