We 've been using Cumulus Workgroup in our marketing department for a couple of years (I started with 6.6, upgraded to 7.1 and now using last released version 7.5). My collaborators and I (we are around 10 people to use it) already noticed big performance improvements with 7.1 but the current release is by far the most stable and responsive Cumulus ever made.

New features aren't really revolutionary but are pretty useful and time-saving (particularly transparency support and collection basket to batch edit files). Also nice improvements with the internet client which is (finally !) using web 2.0 technologies and is greatly integrated to the company Intranet.

My general opinion is that 7.5.1 is definitely a 'Grand Cru' that restored our confidence in Cumulus to manage our huge files repository. Great job guys!