I have one and used it for the past two years or so. Love the machine overall. It definitely takes some trial/error in getting it set up properly and staying that way. Because it's arm powered, it's somewhat of a violent stroke which in turn knocks adjustments out of current settings, a little quicker. So...make sure you always test your stitch line on similar thickness/type before running a stitch on a final product. I'll never part with mine but it is now my back up as I recently bought a CB 4500.
Good luck if you go that route. It's definitely a good machine and will stitch through a car if needed...