I love Pipedrive and as a reseller (we offer a software product in the solar panel market) we have ~25 clients using it. Most of them are quite happy with it.

One nuisance we're having is that adding a number of custom fields soon gets a mess in the sidebar. Having some section headers would really help! See screenshot. 

Would love to hear the view of the Pipedrive product team on this one.

Also, sometimes custom fields differ depending on the pipeline, or the type of organization. Being able to customize these fields depending on the type of business would also really help.