It takes little time to post to multiple social media sites, and even customize the message for each destination page, using Buffer. The web browser plug-in is a great tool (although it doesn't work all the time).
I experience glitches with Buffer every few days, and have had trouble with Buffer not supporting certain social media resources -- had trouble with LinkedIn, in particular, for example.
Ensure that all the pages you need to post to are supported.
It was a problem not having enough time to visit and post to every single social media page; it was time consuming and inefficient. Other tools had a high learning curve, exacerbating the problem. With Buffer, it's quick and easy.