What does Salesforce do well? We just switched from VTiger to Salesforce (online version). So far it is a little more difficult to get around but the search functions are far superior to VTiger and the overall functions are much better. It is very clean and as stated before when I am in a hurry and just put the organization name or any part of it in the search field it finds it right away. One slight mispell and VTiger would not find your account.
What does Salesforce not do well? Not showing the email address on the main screen is not good. You have to click on DETAILS tab to see email addresses. Today this is the most common form of communication in business.
What do you wish you had known about Salesforce before using? I wish I would have known that everything could be merged over by the Salesforce team including document attachments.
Have you used a competitor to Salesforce? If so, how does it compare? Vtiger- Salesforce is WAY better and the reports that you can run are a lot more specific and granular.