I have one and it got me started on FMQ on my own. I did only smaller quilts - baby size - but loved how tightly I could get that sandwich on there. The biggest problem is the small throat in my machine - I have only 4.5" of space between the needle and the rest of my machine - as the quilt rolls up that space gets smaller and smaller. Without it I don't think I would have ever had the courage to branch out into the FMQ I'm now starting to do.
The poles I have are 48 inches long so that limits the size quilt you can do. I don't think I can handle larger ones - above post talks about that.
Here's a post where I talked about it - scroll down a bit to see pics of what it looks like set up.
http://www.quiltingboard.com/picture...g-t176981.html