Tatiana98, when I knew I wanted the Innova, I had to decide on whether to go with the regular SR or the LS due to the price. I was able to try both on machines located in homes. I got my answer and went with the LS even though I knew I would be using robotics most of the time. I had a 3rd party robotic system that didn't need the LS. When I went for a newer robotic system if I'd gone with Innova's AP I would need the LS but I went with another brand that again didn't need it but it comes in handy when I go to baste my quilts. I still try my hand with rulers from time to time too so again the LS would come in handy.