Disodium laureth sulfosuccinate is considered very mild, with good foaming and detergent properties. Sulfosuccinates are recommended for oily hair as they can remove oil and sebum gently without stripping hair too much, but all hair and skin types can use them without fear of harshness.
The pH of the sulfosuccinate is around 6.0, so it is perfect for hair and body care products. They are stable in hard water, but they are poor solubilizers, so you might need to use something like polysorbate 20 or polysorbate 80 if you want to add more than 3% oils or fragrance or essential oils. They don’t thicken with salt, so if you’re using a sulfosuccinate as your primary surfactant, you’ll have to thicken them with Crothix or gels or other non-salt based thickeners.