I had no issues when using this software for my work to track task status & deadlines etc. The interface was friendly with nice visual representation of tasks / projects. There were few minor bugs here n there which could have been fixed easily but nothing major like slow speed or anything as such. They are one in their field so definitely look into it if you use any other softwares. We used them mainly because they do not charge much (which we needed at the time) and also the features offered to us by them was good enough for our needs. Took care of project managers, clients, resource management all through out the process. Very efficient tool to handle multiple tasks at once. I like how easy it was to use this software for my business needs! It's very user friendly with everything you need right at your fingertips!! Nothing really as far of disliking anything about calance other than maybe their pricing could be better but i'm sure they will work something out by then :) Great product overall just price may not seem worth while sometimes if its more expensive in comparison do some research first before purchasing otherwise great service/product.