Nodoubt, Basecamp is good but it lacks important features like time tracking, private messages and integration with google. Have you tried proofhub? Features like time tracking, casper (hidden) mode, to-do's, discussions make it awesome. So, you don't miss anything.
Basecamp sets the standard for ease of use and also importantly in data sharing with other applications. It would even be better if they told developers when they change their API!
Loving it so far...9/10 for Proofhub...