First off, my family and all of our friends absolutely love these skates and I will continue to recommend them to everyone I know that has small children who are interested in roller skating and would prefer to skate inlines vs. quad skates.Our daughter is 4 years old and the convertible setup to 2 wheels in the back has enabled her to build up her balance and confidence while learning how to skate all by herself in a little under 1 month. The adjustable boot and convertible setup to inline wheels will grow with her over the years and not force us into buying additional skates every single time she decides to have a growth spurt. I appreciate that these have real bearings and wheels, which actually move quite nice, unlike many competitor intro inline skates that either have plastic wheels and/or no real bearing and cause children to walk with skates and "baby step" too much rather than learn the actual mechanics of it from the start.Also, while skating one day, my daughter lost one of the plastic spacers that help keep the wheel properly set on the axle (because I hadn't tightened it back up enough after replacing her wheels for some light-up wheels ). I tried finding a replacement plastic / metal spacer in my local hardware shops and even looked everywhere online, but could not find. I reached out to Still Pro (the seller on Amazon) and BR from Still Pro helped ship me some replacement parts (free of charge) and was so awesome / polite the whole way through. He even threw in a cool LED USB light (thanks BR!).