The fact you can see all of your sales data in one place, which is very helpful when working with leads or customers who have their own needs as well; it's not too easy though if there are multiple people involved within an account at once so I don't think this would be a good fit unless only 1 person manages both accounts together (i'm assuming). Also sometimes we'll get reports where someones information will disappear from our system after they've left but still shows up. This has been fixed recently! So far no issues - just makes tracking what happens throughout projects much easier than having different spreadsheets/text files etc.