I have one! I haven't used it a lot and it's my first embroidery machine so I don't know how it compares to other machines, but so far it's a solid machine and all of my bad embroidery have been caused by me making mistakes (using wrong stabilizer, etc.). I had some thread shredding issues at first but switched thread brands (was using cheap poly from Joann's) and that fixed it - so don't go too cheap on your thread and try a spool or two before buying a whole rainbow.
I bought my machine from Amazon and it was ready to go right out of the box; I didn't have to fiddle with tension or anything. The needle threader on there is great, better than the one on my Janome 6600.
I used it recently for some fairies I embroidered onto quilt blocks (before they were quilted), and I plan to use it more for some Christmas gifts soon. (embroidering tea towels)
I've heard you can use it to do quilting but I don't know how, never done that before. Does seem like it'd be pretty cumbersome, but maybe not if you were doing a "quilt as you go" style quilt and doing it a block at a time. The space I have mine set up in would not work for cramming a whole quilt into the machine anyway; I had to sort of tuck it into a corner.