I question my T quite often (sometimes for no good reason other than just to be oppositional ). He takes it really well, we do discuss it sometimes (no reason if it was just me wanting to say no) and his "approaches" change accordingly- it is MY life (and my money) we are discussing there afterall so right or wrong I have the final say.
I feel like I should add that I for one don't think Ts know best (even with all their experience and expertise...). I use their opinion if I think they might be onto stg but no blind trust approach here. (I understand that it works for some just not me)