I have used hauliers from U-ship on a number of occasions, and have had nothing but good luck, if luck is what it is, with all of them.
Great concept. Useful, efficient and economic. The more 'flexible' you and your seller can be with timing, the better shipping deals you can obtain.
Please remember that loading and unloading these guys is a major factor... You should at least be prepared with the necessary lifting gear, if it's required, even if it's just 5 of your buddies, and be ready when the haulier arrives.
If the guy has to wait for 3 or 4 hours to get loaded/unloaded he has every right to nail you for extra charges. This is his job. Time is money.
Thanks to those guys that have worked for me.