It really works well with both. We?ve put together many pieces like this, so we were able to figure it out. This is a quality, well built, well designed product. But one week in with them and Im satisfied. If you use them you will want to cover them with the included stainless screw caps. The shoe is nice but the top strap hurts after awhile. Sure to be a summer fav! I was able to successfully update the software and maps for the 57LM. I am 5?2? and 190. My six and seven-year-old love these shoes they are very soft and easy to wear.