The best part is that it has a great user interface which makes you feel comfortable while using this software! I have been working with simuldocs since last 3 years now and haven't faced any problem till date. It's very easy to learn and use compared to other tools out there in market. Since its an online tool hence we can access from anywhere but at times when i open my office file then sometimes it shows error like "Unable to connect" or something else may be due to internet connectivity issues etc. But overall experience was good so far. We are solving our cross-platform requirement of having multiple versions/editions across different platforms (Word documents).