Love the idea of having website functionality to help manage and inform a group without being a web designer. Meetup could be awesome. Instead, it has been one of the worst experiences with any company for me.
First, their customer service is non-existent. I tried to contact them on multiple occasions for various issues such as having a very strange URL assigned to our group and also billing questions. No response, until the 3rd attempt. And that response was basically, 'tough, deal with it'.
Second, I cancelled my meetup membership after 2 months because it just wasn't working for the group and I decided to go back to using a website. Apparently, the membership canceling process was ignored or didn't work. They billed me for 2 additional month despite me removing my credit card information from the site. (this is when I received the 'tough, deal with it answer'.
Third, apparently the new UI defeatured the site. It is really not functional at least for our group. You can only post pictures. Navigation is awkward at best. It seems like a UI from about 2003. Just not good.