Seems to be working well for me 1 month in. Including their cash back offers (think coupon book) I estimate 8% return on spend (this is predicated on a 2900 mortgage).
$12k annual spend requirement, easily accomplished with cell phone+car insurance+big box/grocery to make up the delta. HOA, and electric charge a 2% fee, so they are out.
Looking at ~$800 equivalent to 1-3 nights in an accor hotel per year, + $120@Lowes, $65@Costco, $200@thumbtack
Minor quirk, my kids after school activities were classed as Educational Services 1x earn which did NOT trigger the day care category.