Welcome to the quiltingboard. I have a longarm, but it is a Gammill. I have never done a king-size on it, but will probably get to one next year. I have had it for a year and have probably used it for 30-40 hours (sewing time).
I haven't used it for the past couple of weeks though because my sewing room was stacked all around/under/on it - now we are getting things put back together and I am hopefully going to 'find' my longarm next week. lol