Marketo has a great UI that's both easy to use and navigate.Set-up took a while but Marketo support offers extensive training for new users, both on-demand videos and a 4-day live training session online.I adopted Marketo after using Pardot for lead management and email automation and was very pleased with how easy it was to integrate 3rd party tools. The extensive integration with GoToWebinar and SFDC saved me tons of time following online events.Additionally, the Marketo Community offers extensive information as well as the ability to suggest and vote for new features. If I couldn't find my answer in the Community, the support team was always very helpful.
Room for Improvement:
The design studio offers limited out-of-the-box features and we had to work with a developer to create new landing pages etc.Changing a campaign in progress (i.e. changing the wait period between emails) is unnecessarily complicated. We would have to create a new, nearly identical campaign, pull all leads out the initial campaign and move them to the new one just to change a wait step!The support team in Ireland is very helpful and always goes above and beyond. I wish I could say the same of the US based support team - when I spoke with them, it felt like the rep was reading a script and not listening to my question at all.
Overall - I am very pleased with Marketo for email automation and lead management. I recommend it as a tool but don't disregard the initial training they offer to new users. Not all features are intuitive and training sessions point you in the right direction.