I use Kuebix to arrange freight shipments. The interface is fairly easy to understand and use. It's much easier than what I had with my carrier previously. I work for a small business, so I don't use all the 'Pro' features. However, the basic set of capabilities makes it very easy to arrange for a shipment. It has an address book and remembers the important details. This is very helpful, even though we only have a few suppliers. Booking a shipment is only 5 minutes, once I have all the information I need. It also provides access to tracking information.
Their support was also excellent. They contacted me in less than an hour, often in just a few minutes and helped correct things even when it was my mistake. Support can be either via email or phone. Review collected by and hosted on G2.com.