I got the Go! Mix and Match Starter Set...came with 11 dies along with several of the different size mats. I really thought I wanted it, and couldn't wait to get it in..I have used it twice, once for 2 1/2" strips and once for 6 1/2" squares for a swap...and it worked great...but I have not used any of the other 9 dies and have actually thought of selling the whole thing...I just can't decide if I may actually end up using it more or not...sorry I am not much help other than to let you know it does work great for accurate cutting. I also have Lupus and while you do have to crank it, it wasn't bad in my case...but as we are all different, I agree you should talk with your PT and explore your options...Do you know anyone that has one that you can give it a go (pardon the pun) and see what you think? Also the more layers of fabric you put in the harder the crank is, so it can be "tailored" if you need to make it easier to crank...
Regards,
K