The best thing about it, to me personally as an end user of this product was that I could see exactly how much revenue we were losing by not having our customers purchasing from us! This helped drive sales in some cases where they had been slow for years before using PPMs like ours (and with other companies).
It also made life easier when dealing at customer level because you can target your efforts more effectively - which saves time AND money!! There are so many features available; however there's no way around learning them all if one wants full functionality out off any given tool or service offered within their system/platform etc.. However once someone has learned everything then switching tools isn't too hard since most things work well together anyway e.g., Salesforce + Marketo = One seamless solution.