I have a Nolting Fun Quilter. I've found it's easy to use, and I haven't had any problems with it. The tension is easy to adjust, and the stitch regulator works well. It's definitely a whole new skill compared with quilting on a home machine, but (even with my limited skill and experience) is much faster.
The only drawback is the size of the work area -- its throat is 17", but due to the rolled quilt bulk, the actual working space is more like 12". I presume this is the case with any of the midarm machines like HQ 16 or George. Oh -- and I'm left-handed, so the handle controls are on the "wrong" side. I don't know if these can be switched or not, maybe so.
The George wasn't available when I bought my Nolting, so I didn't get to test this machine (though I loved the longarm APQS Millenium). Before buying, I tried every machine available at the Machine Quilters Expo. Of the midarms, which I decided I should get (I'm not in the quilting business, and couldn't justify the cost of a longarm), I liked the Nolting Fun Quilter best. It seemed solidly built and ran smoothly. I also liked the professional-grade 12' metal table I got with it, which I can use in the future if I decide to upgrade to a longarm.