Concepts has great stylists. Every time I've been they've done a great job with colouring my hair, they've been on time and I get a perfect colour match everytime. Andre gives a lot of thought to smoothing out the colour throughout when I got my roots done to make sure it's evenly coloured from roots to tips!
One thing to watch out for- there's a girl at the sink who does a really poor job at hair washing. She's rough, she pulls your hair, drags a comb through it abrasively and gives you the overall impression that she'd be great with a washboard. To top it off, she barely patted my hair dry and talked with other girls at the sink about how another staff member was planning on quitting soon! Too much. Best to avoid!