I have used Unishippers on many occasions. My first experience was not very good.
The salesman was not very knowledgeable and I did have problems and stopped using them. A few months later I received a call from another Unishippers salesperson. After much discussion I agreed to a quote request. I allowed him to ship my freight and things continued to go in a very positive manner.
I think it is all about the person whom you work with. I now do all my freight moves (when rates permit) with Unishippers and am very happy. My salesman Bob Gubler is fun to work with and replies to me regardless of my request immediately.
I do understand people complaints but fair is fair. I give credit where credit is due.