It's just that a friend of mine said that Belle Saison has lots of yeast flavors except for the right ones. :-P
Represent!
I've used BS thrice now. First was a sour wort saison. Second was a Maris Otter/Summer SMaSH. Third is a quince saison currently in secondary. The latter two were fermented at room temp (20°C or approc 68°F) without temp control. The first was fermented warmer, at 25°C - 77°F, also without temp control. All very loosely and casually brewed, in true saison spirit.
All three displayed an in-your-face level of yeastiness which was decidedly un-saisonesque but hard to describe. No pepper, no lemon. Certainly not clean, nor very dry.
The SMaSH in particular ended up tremendously yeasty, with the BS completely overpowering the hops. Some people thought it tasted "like an abbey beer" which says nothing other than "I don't know much about beer" and "this yeast does NOT taste like saison yeast in this beer".
I don't mind the level of yeastiness itself, but the yeast flavours I got from BS just happen to be flavours I don't much like, nor associate with saison at all.
That being said: there is no such thing as a typical saison-profile, so I'm not overly concerned. I just don't get that warm fuzzy feeling of Belle Saison love.