I am very happy with the assistance I've received. I have a temporary issue (from a fall) that I'm hoping will be resolved in a month or two. A cast on my left arm for wrist fracture, and left pelvis fractures. Due to the cast, I had difficulty figuring out how to do my left arm in the m+d crutches. I cannot hold the hand grip on the left crutch due to the cast, as my right hand holds the hand grip on the right crutch. In calling the company, and asking for assistance, I immediately received a call back by a very knowledgeable and helpful gentleman. He gave me suggestions and I now feel optimistic about my ability to correctly use these crutches. I will need practice, but I am encouraged. MobilityDesigned is truly a company committed to the ultimate in customer service.