Edit: I've since had a change of heart and am changing my review. My original review is at the bottom.
----- UPDATED REVIEW -----
Circumstances had required me to reinstall WP & plugins. Went to reinstall 3.2.1 on WP 3.8.1 and had the same problems with AJAX "-1" errors on the settings page.
While I think the support could have gone better, ultimately the developer was able to find the problem and release ver. 3.2.2. This introduced a new problem however.
After giving the developer login credentials to the site, he was able to see first-hand the problem, provided a workaround, and indicated the problem will be fixed in the next version.
Perhaps I was a little too harsh in my original review. After all, most WP developers are usually one or two guys whose passion is WP and extending WP. Not making any excuses, but in my defense I wouldn't have been so upset originally if I hadn't just laid out $150 for the plugin. For $150 you expect something that "works". (Dear mods - yes I know this is the support forum for the non-commercial version of the plugin, but the same problems that have plagued the pro version also plague the free version.)
So I'm revising my review. I won't give this plugin 5 stars, because while it may be a tremendous time-saver, it's just too flaky, and the development lifecycle is too… unpredictable.
Personally I think this should be split out to make the codebase easier for the developer to work with. Have a main plugin and separate plugins for each social network that way when an API changes in twitter you only have to update one small plugin and not the behemoth.
Anyway, these are my words, and I stand behind them.
----- ORIGINAL REVIEW -----
I gotta say I'm incredibly disappointed and frustrated with this plugin.
I've been fighting with this plugin now for over a week, have had to open about a half-dozen tickets with the plugins' author, and have even had to resort to posting here since he took down the forums on his website. I can honestly say that I'm ashamed to admit I forked over the $150 for the WPMU version.
My heartfelt honest advice?
Save your money.
Consider using IFTTT instead. It allows you to automatically setup recipes and connections to the same social networks and can automatically post from all of your blogs (WPMU or not) based on when you publish a new post.
Honest to God I wish I could get a refund.
This is a great concept, but poorly executed in my opinion.