It is very easy to use with great UI design which helps me to do my bidding task easily without any hassle of learning new things or anything else as it has everything that I need for doing my work perfectly well. The only thing i dislike about this tool is its price because if you are not using high volume service then why pay so much? Yes definitely worth paying but still there should be some discount offered by them like 5-10% off their current rates otherwise no point talking abt such costly software's. Bidding process was smooth & quick enough to complete within few minutes. Also they provide excellent support team who always assist us when we face issues related to our business operations. As per now nothing at all really negative points can be said regarding the product other than pricing factor. But yes once again pricing issue needs to addressed properly before going live or even thinking of.