The only concern I've heard from people with this machine is this: In Stitch Regulated mode, the stitching does not totally stop, when movement stops. You would need to turn off the machine for the needle to stop, making it a little more difficult for any ruler work. You would need to stop the machine to adjust your ruler and continue quilting.
Also, Tin Lizzie does not make a 1/4" foot for precise ruler work. There have been some ingenious people, who have adapted their feet to 1/4" though.
If you are not planning to use rulers in your quilting, none of this will be of any concern to you and the machine will be a good one for you.