I own a Husqvarna Viking Platinum 755. I LOVE it -- I've had no issues with it. I love how it's easy to place the bobbin; also love how the sewing needle placement is adjustable. It sews beautifully...has way more stitches than I could ever possibly use, though. The only issue I've ever had was that the feed dogs would occasionally kick the fabric to the left -- I resolved that issue by getting a piecing foot with a guide.
I sew almost every night for at least an hour or two, and the machine has held up beautifully so far.