I spoke a bit inartfully, I think, so let me clarify.
If not adjusting for the price (I think now 44E for 5 course dinner, IIRC), and ignoring the environment (a.k.a. fun factor), I’d note that often 1 and occasionally 2 of the 5 dishes I’d consider just “meh”. Not bad, to be clear, just sort of ok. But that means 4 or sometimes 3 of the dishes are very good to excellent.
On top of that, I include the fact that the “twists” are different (in a good way) from “pure” French fare, that the variety is nice, that we really enjoy the convivial environment (regular readers of this board may recall that for most restaurants I don’t weight this factor very highly), and the price and so qualité-prix, and this is why we always return.
And as it happens, the two most recent times we’ve been, I’ve particularly enjoyed the meat course (duck one time, and the veal last time), and for me it’s actually been getting a bit better, not worse. But there is little doubt that there is variability in what’s offered, and I can certainly see why, even if we all had near-identical tastes, any one meal might not be that good. Plus if one doesn’t enjoy the “formula”, that part surely isn’t changing.
But unadjusted for price I’ve had better food at many other more expensive Paris restaurants. So if I were only coming to Paris for 3-4 days once a year or less, then I wouldn’t put it on top of my list. And that’s really the context of my comment re “not always the best food”.
[Parn reminds me that it’s actually 6 courses; I never know/remember whether to count the amuse. But that additional course only increases the value.]