I agree.
I also will say....well....a dress that may be great at one time of year can be miserable at another time of year. PLease consider the time of year and weather when putting your child in a costume. Also, some cotumes are just not practical in an amusement park- period.
In July, we saw a number of girls that were in costumes - esp some of the homemade ones - that were just almost cruel in the heat and humidity. Many homemade ones are FAR better than the DS or DP ones - so I'm not condemning all homemade ones by any means - but some were very impractical. Some kids were literally in tears, and the parent wouldn't budge.
Please just consider how comfortablethe cotume is to wear, and remember, you can always stow it in a locker at the park if it gets to be too much.