A really great concept. Not sure if it was just my experience but their website was confusing and I couldn't figure out what they did from their site. Maybe a better explanation on their site would help. Their social media presence was also lacking and didn't really tell me much about what they did. The best thing about them though is the fact that there's so many companies using this tool (and probably more) that you'll find one that will work with your project needs. They're always adding features to make it easier to use as well which keeps things fresh.