I found several search results related to nail products, but none of them specifically mention "Symphony Nails." However, I can provide some general information about nail products, including ingredients and materials, as well as positive and negative reviews.

Ingredients and materials:

• Nail lacquer typically contains ingredients such as butyl acetate, ethyl acetate, and nitrocellulose.
• Some nail polishes are formulated without harsh ingredients or adhesives that can damage nails.
• The OPI Nature Strong line of nail polishes is reportedly cruelty-free and vegan, and formulated with ingredients derived from sugar cane, manioc, wheat, potatoes, corn, and clay.

Positive and negative reviews:

• Customers on Amazon have left positive reviews for Orly Nail Lacquer in Synthetic Symphony, saying that it is a "great color".
• Beetles Gel Polish Nail Set in Nude Symphony has received positive reviews on Amazon, with customers saying that the colors are "nice" and the product is easy to use.
• A customer on Etsy left a positive review for Kbshimmers Bittersweet Symphony Nail Polish, saying that it is "absolutely beautiful".

Its important to note that the safety of cosmetic ingredients is regulated by organizations such as the European Commissions Scientific Committee on Consumer Safety (SCCS). The SCCS provides guidance for the testing of cosmetic ingredients and their safety evaluation.