Before we were referred to GreenBird Media, we had very bad experiences with web designers, some we were even referred to. We were really unhappy with our previous site, but just hated the thought of spending a bunch of money just to be sorely disappointed again.
When we decided to go with Greenbird media and work with Susan, I spent relatively little time with her reviewing what we wanted the site to portray about our company in comparison to the hours of time and personal visits we had to make with our previous designers. I just didn't want to waste my time again. Regardless, she came up with the fresh look we wanted and had lots of good insight into design, marketing and text writing.
Other positives: They were always responsive and did everything asked, when asked. They worked with our hosting company and SEO company to integrate with what they were doing to make sure everything coordinated and worked.
Negatives: Honestly can't give you any from our experience. If this can be considered a negative; they are not super techies, but worked out all the technical stuff with the people who handled those areas.