The most powerful, extensible CRM on the Market. Cloud based, deep API, and one of the most integrateable software options out there. Also sports a massive app-store for add-ons, and a highly engaged community that help each other troubleshoot via message boards. The answer to any problem is usually a quick Google search away.
Pricing tactics are tricky. Service is slow, clunky, and unhelpful. Difficult and expensive to maintain