If you read the instructions on any can of wood conditioner (at least on any I've read) it tells you to NOT use it on maple.
Not sure why, but I built a solid Maple vanity for a customer last year, stain was driving me nuts since maple absorbs stain unevenly and leaves the surface ugly and blotchy, could not find any advice anywhere about how to get good results with maple.
Finally asked a friend who is a luthier (and knows lots of tricks about wood treatment) he suggested plain old Knox gelatin, paint it on and let it dry as a pre-stain treatment, it seals the open pores in the maple and lets the stain set evenly.
It works, use a new, totally clean brush, heat the gelatin gently and keep it warm in the pot.
I'm not kidding, this vanity was over $5,000.00 I needed a perfect finish and got it with the gelatin.
Doubting "experts" will no doubt leap in and tell me my error and explain why you shouldn't do this,