I like how easy it was set up in our server room (it's so simple).
The customer service has been very responsive when we needed help setting something else than just basic features - they've helped us get all kinds off things working! We're using this product primarily because its free but there are some paid addons available which can be helpful if you have specific needs not covered by default functionality such as SSL certificates etc.. They don't offer support outside their website unless your issue relates specifically to them providing hosting services rather then general software issues/support though thats probably understandable given where most people go first these days :) If i had one thing negative about clustercs would really only say maybe make sure before purchasing anything online always check out reviews here since everyone will give different answers depending what other products those reviewers use alongside theirs.