Vinous starts off the parade of outstanding ratings here:
The NV Brut Tradition is a deep, powerful wine bursting at the seams with fruit. Melon, white flowers and minerals are some of the notes that take shape in the glass.This is a deceptively mid-weight wine, yet there is plenty of power to back the fruit. The Brut Tradition is another strong effort from Dieblt-Vallois.
Wine Spectator 92:
Like an orchard in late spring, this blends floral and fruit notes of ripe apple, white cherry and apricot. There's a firm backbone of zesty acidity and underlying minerality, with a lingering hint of ginger on the finish.
Both publications rate this above any Veuve Clicquot they’ve ever reviewed! (And we agree.) And both price this at $54.