Yes, I love my 870. I went to a workshop a few weeks ago and took my Janome. It was not a happy reunion. Straight sewing was OK, but I came home and ripped out all the machine quilting I'd done on the Janome and did it over with the Husqvarna. It's the only machine of the four I've owned that I've been truly comfortable machine quilting with.
I love the automatic presser foot and the precision of the machine. The novelty wavy quilting stitches are superb and it's the fastest machine I've ever owned.
But I will add a word of caution. The original 870 I got back in September was a lemon, and the dealer replaced it. There is a Yahoo Group dedicated to Viking Sapphires, called unsurprisingly, Viking Sapphire Owners, and I would recommend you join it and spend some time looking in their archives before you commit. Good machines are truly wonderful, but there are some not so good ones out there. People have had problems with tension, with feed dogs refusing to stay down (my major issue) and with general temperamental behaviour. Educated is forearmed and to be honest, as happy as I am with my machine, if I'd known all this beforehand I may have made a decision to get a different machine, even though I'd wanted one for so long. Happy to chat more about the specifics if you message me, as I don't want to be too negative on a public forum.