These have stainless steel reeds (usually brass in other makes), so I am expecting a far longer life from them.
They have a little more ring than brass reeds, so mic distance is important.
I love the shape and colour too. Smooth/easy on the lips, easy on the bank account.
(update) I was wrong, blow on hole 7 went flat. I don't use "LOW D" very often at gigs, This one particular reed must have been used for less than one second in all its short life . Low D with brass reeds usually last almost a year.