[cardiffspaceman]

Hairstylists at the walk-up-only places that say they do a "super" job often put caustic chemicals on clients where the chemicals don't belong and don't clean it up as they go. The client will be somewhat more comfortable at a better salon. Box color from a drug store is very mild and doesn't last as long, so DIY is not great. Hair straightening chemistry "from Brazil" is so hard-core that pregnant women feel the need to avoid the area (or salon). So not only does the required training matter, there is a huge correlation between what you pay and what it's like.