I saw one of those demonstrated in Puyallup last month and was very tempted since I would love to make a Drunkard's Path quilt - maybe I will put that project on the bucket list for a later date - too many other irons in the fire to start one something that could be that frustrating! The only thing I can say about the demo was it too her so long to get around to how much the darn thing cost, that I left ... she did make it look easy though!
Good luck with your project - I am sure you will figure it out and be happy with the finished project.