We ended up purchasing this miniwalk 2 from Especialneeds online around December for Christmas for our 4-year-old down syndrome and autistic son who was on the verge of walking but not quite there yet. He needed the extra hand and confidence to show him he could do it himself. We got five different types of additives that ranged from $299 to $799 and the device itself was almost $4,500. The silly little monster sat in it one time in our living room moved around in it and never got in it again. So it's literally only been used once and the extras that we have with it have not been used at all including the rollback preventer, etc. It comes from a smoke-free, pet-free, and very clean home. If you'd like more information about the device itself you can check out the website at e-special needs.com and look up the mini gait trainer 2. We are actually willing to sell this for about the 4th of the price of what we spent because we are facing eviction since I have not received my stimulus check still. This device with it s additions is worth over $5,000 but we are willing to sell it for $2,000.