The ability for users (fans) from around th world can interact with each other in real time is pretty cool! I like that it has so many ways we are able t get our content out there more easily than before!! Nothing really dislike about gig rev but maybe its because im new at using this platform as an artist myself lol i cant think of anything right now :).
If u want something simple yet effective then go ahead give these guys some serious thought. They helped me promote my upcoming event via facebook which was very fun :).