This website is 100% free and is very fun to use. Unfortunately, there are 2 main issues:
1. Glitches - sometimes the skin you are editing glitches and some pixels get removed, or moved around
2. Inappropriate accounts - I've seen way to may accounts where the person (or bot) creating the account has added an external link (luckily, the Skindex blocks out those links, but not the ones in-web) to what the bio claims to be an inappropriate picture.
The bad sides is far outweighed by the good sides to this website, so feel free to check it out.
Thanks for reading.