Any hairstylists/cosmetologists?

Hi! I'm a blonde that gets my hair highlighted/bleached and I was in a pinch the other day and needed Purple shampoo. I came across this Root to End Purple shampoo at Dollar General for $5! It's cruelty free, vegan, no parabens, sulfates, and they add amino acids to it. I love how it works and it makes my hair feel amazing. But I know drug store shampoos are crap and with this coming from dollar general I'm skeptical. I was using Matrix so silver which I love, but at $5 I can't beat the price. Has anyone heard of this brand? Does it sound like a good shampoo?