If you can get your hands on a Yellow Rose by Lone Pint, you'll know exactly the flavors Mosaic imparts. It's a SMASH with pilsner and Mosaic. And it's super delicious. Lot's of grapefruit in my opinion.
I've had lizard king by pipeworks that is a Mosaic only hopped ipa and really liked it. That gave me the inspiration to use it.