I liked how easy it was to find contacts, even if they were not in my business account or had no emails stored there yet (which is quite often).
Sometimes when loading multiple lists would cause some problems - sometimes just refreshing them solved all issues but then other times we'd have an issue where one list of people wouldn't load while another did fine until refreshed again later. When searching by location/state, most searches didn't show any results at first so after several "refresh" attempts usually showed up eventually as long as your search string wasn't too generic such as state = CA only vs city + State == San Francisco etc.. There are many ways to sort data into different views however the way our team uses chaos intellcts makes it difficult using those filters since everything gets pulled together and sorted before filtering shows anything new unless.