I purchased my dealers Tin Lizzie 18LS model almost 2 years ago and also add the Quilt Magician robot to it this summer. I had a bit of a learning curve at first, but that's the case with anything a person buys.
Never really had any trouble and when I did it was taken care of by my dealer very well.
I do wish I had a metal frame instead of the wood frame. And get the biggest throat size you can afford. Mine is 18 and I am thinking about getting the Ansley 26 made by Tin Lizzie (with a metal frame this time.)
And don't forget, it takes practice and patience to learn a longarm. They are different than a regular sewing machine.
Good luck!