My HD has used Pureology products on me for years. No harm, no foul -- she still uses them and I don't protest
I find them to be gentle enough, but not necessarily of greater quality than any other high-end line. I think the Pureology "thing" is that they don't use sulfates in their products. I remember 1-2 of the shampoos having peppermint in them, so you may feel your scalp tingle when she is using them -- if you have a sensitive scalp, it could feel like a bit of burning. The styling products I've seen do have cones in them -- I saw dimethicone (and maybe a second cone also) listed in several items on her shelf. IME, I have not had any adverse affects to hair, scalp or haircolor with her using the Pureology stuff (once every 7-8 weeks).
If you like something enough to buy it for home, make sure you understand the "guarantee" Pureology offers. Years ago, I bought S&C from my HD and really didn't like it after several uses at home. I brought it back to her at my next appointment. She said that I am really supposed to send it back to Pureology for a refund, even though that is a hassle. I told her that I wasn't going to do that, that if she didn't want to refund my money, she could deduct the price from that day's cut/color fees. She did.
BTW, I love your avatar pic!