I am still confused about this stealth address.

I can generate a new address for a payment, and then I will have total price on that transaction.
If for any reason I want to have privacy over the future transactions of that uotx, I could use a coinmix service.

Is there any advantage of using an stealth address over his method?
Maybe convenience, if there is an easy client to handle stealth address?

+1 merit for pugman, for the best question so far.