I'd change a few things. First, try on the costume ;) Seriously, I went off sizes and didn't try it on until it was too late. Also I'd wear some gloves.
For the stilts, more padding on the leg brace and proper sizing could be improved. Also the side braces (cross pieces like a catamaran on my foot so I don't roll my ankle) were too wide so I would step on them (like stepping on your shoe laces). Other than that, they worked great!