I like how easy it is to use when creating new clients in our system as well managing existing ones! It has been very helpful for us since we have over 500 accounts already created within minutes instead having all those names manually input one by time into multiple spreadsheets/databases etc..
Also great customer service from their support team which always gets back quickly if needed!! Nothing specifically but would love more reports available at least 1 month out showing my PPC spendings per campaign including CTR's.