I’ve been a prose user for about 6 months - I’m on my 3rd bottle of shampoo and conditioner. The products are effective and do seem personalized - my hair is softer and more glossy than with my prior haircare products. Their scents are beautiful (but you can go unscented too if you’re sensitive).
Ordering is easy - you take a survey to see if your last order did what you needed it to, and they adjust your formula accordingly. You also have the option to stop ordering pumps for your refills, so you can re-use your prior pumps.