I have used this app in the past for rearranging my small apartment — actually one room serving as a recording studio/bedroom/office/bathroom, you can imagine how it's critical to find out how to fit everything in... ;-)
SweetHome is really handy, designing your furniture and testing various fittings until you find the best one.
I've had a freeze since v4.5 under 10.9 whenever I opened the save dialog, I never understood what was causing it (incompatibility with another software? Java?) — it was working ok in a clean user profile or in a 10.6 virtual machine, though...
Looks like the issue has gone with v6, I was not able to reproduce it but I haven't used it extensively neither.
Great software, anyway! :-)