I recently switched to constant contact and needed an email capture for my joomla site. The html code from CC lacked the aesthetics to match my site. I found this module/plugin and decided to give it a try.
The options available helped the form match my site. I wanted some styling help and the support, not only gave me the code (which was template based, not module based), but they also updated their product to include an option for one of the styles I requested.
In the wide world of extension support, there are all levels.... Joomladds is top notch.