I really like that it is easy to setup, easy to use, has great tools for tracking your leads, and can be used as an email tool or website tracker! It's very good at what it does but sometimes you have to go through some steps manually which could make things more complicated than they need to be.
Overall, I think its worth trying out, if only just for the free trial we received from them. We've been using this software for over 6 months now and love how effective it has become in our business.